Lks Stoikiometri

LKS TERINTEGRASI CHEMVID TUTORIAL

1. Gas nitrogen (N2) merupakan senyawa yang memenuhi sekitar 70% dari total udara di atmosfir bumi. Jika disuatu ruangan diketahui mengandung udara dengan partikel-partikel gas penyusunnya sebanyak 10.000 mol. Berapakah jumlah partikel gas N 2  dalam ruang tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 23

2. Jika diketahui dalam suatu wadah terkandung 24,8 * 10  partikel air, berapa mol H 2O yang ada dalam wadah tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 3. Cuka merupakan merek dagang dari senyawa asam asetat, CH 3COOH. Jika diketahui jumlah asam asetat dalam suatu botol adalah 6 mol, berapakah jumlah atom hidrogen dalam botol tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ......................................................................................................................................................

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LKS TERINTEGRASI CHEMVID TUTORIAL

4. Suatu molekul AX2  memiliki massa seberat 30 gram. Jika AX 2  memiliki massa molar 100 gram/mol, berapakah jumlah mol AX2 tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 5. Dalam suatu botol cuka mengandung 10 mol asam asetat (CH 3COOH). Jika diketahui Mm dari C = 14 gram/mol, H = 1 gram/mol, dan O = 16 gram/mol, berapakah massa dari asam asetat dalam botol tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 6. Diketahui sejumlah 20 mol zat CX 4 memiliki massa 360 gram. Berapakah massa molekul dari atom X, jika massa molekul dari atom C adalah 14? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ......................................................................................................................................................

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LKS TERINTEGRASI CHEMVID TUTORIAL

7. Diketahui gas H2 yang dihasilkan dari suatu reaksi kimia memiliki volume 2 L dalam keadaan STP. Berapakah jumlah mol dari gas H 2 tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 8. Jika dalam suatu ruangan dengan suhu 30˚C dan tekanan 76 cmHg, sebanyak 5 mol gas Cl2 menempati ruang sebanyak 10 L, berapakah volume dari 10 mol gas Br 2  pada ruangan tersebut? Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 9. Jika dalam suatu kontainer, sebanyak 13 mol gas O 2  memiliki volume sebesar 291,2 L. Tentukan apakah kontainer tersebut memiliki keadaan STP atau tidak! Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ......................................................................................................................................................

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LKS TERINTEGRASI CHEMVID TUTORIAL

10. Jika diketahui reaksi antara gas H 2 dan O2 adalah sebagai berikut : 2H2 (g) + O2 (g)  2H2O (g) Berapakah massa uap air yang dihasilkan jika gas O 2 yang digunakan dalam persamaan reaksi tersebut sebanyak 2,5 mol? (Mm H = 1 gram/mol, O = 16 gram/mol) Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 11. Diketahui suatu reaksi penetralan HCl dan NaOH adalah sebagai berikut NaOH (aq) + HCl (aq)  NaCl (aq) + H 2O (l) Berapakah massa HCl yang harus ditambahkan kedalam 200 gram NaOH agar reaksi tepat terjadi? (Mm H = 1 gram/mol, O = 16 gram/mol, Na = 23 gram/mol, Cl = 35,5 gram/mol) Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 12. Reaksi pembakaran dari C3H8 berlangsung sebagai berikut: C3H8 (g) + 5O 2 (g)  3CO2 (g) + 4H2O (g) Berapakah volume O2 yang diperlukan (dalam STP) untuk membakar 88 gram C 3H8 ? (Mm H = 1 gram/mol, C = 12 gram/mol) Jawab : ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... 122