Postes Stoikiometri Reaksi
Quiz
•
Chemistry
•
10th Grade
•
Medium
Ify Aldilla
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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Setengah mol Al dilarutkan dalam asam sulfat menurut reaksi:
2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g)
Jumlah mol asam sulfat yang terpakai dalam reaksi tersebut
1/3 mol
2/3 mol
3/4 mol
4/3 mol
3/2 mol
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Aluminium (Ar Al = 27) larut dalam asam klorida menurut reaksi:
2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)
Jika massa Al yang dilarutkan 5,4 gram, volume gas H2 yang terjadi diukur pada keadaan STP
1,12 L
2,24 L
3,36 L
4,48 L
6,72 L
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Reaksi pembakaran sempurna gas asetilen (C2H2):
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l)
Jika 10 L gas asetilen pada suhu dan tekanan tertentu dibakar dengan 100 L gas oksigen, maka volume oksigen yang tersisa adalah
0 L
50 L
75 L
85 L
90 L
4.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Proses pengolahan silikon dalam dunia industri dilakukan dengan cara mereduksi silika (SiO2) dengan karbon dalam tanur listrik dengan reaksi:
SiO2(s) + 2C(s) → Si(s) + 2CO(g)
Jika dalam 1 hari industri itu dapat mengolah 30 ton silika, berat silikon yang dihasilkan adalah (Ar O = 16, Si = 28)
1,2 ton
1,4 ton
1,6 ton
12 ton
14 ton
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Gas ammonia (NH3) dibuat melalui reaksi
N2(g) + 3H2(g) → 2NH3(g)
Untuk mendapatkan 250 L NH3, volume N2 yang dibutuhkan
97,5 L
125 L
160 L
250 L
375 L
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Jika 63,5 gram logam tembaga direaksikan dengan 40 gram belerang sesuai reaksi:
8Cu(s) + S8(s) → 8CuS(s)
Pernyataan paling tepat
Terbentuk CuS sebanyak 103,5 gr
Belerang tepat habis bereaksi
Belerang tersisa 32 gr
Tembaga habis bereaksi
Tembaga tersisa 23,5 gr
7.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Sejumlah logam seng direaksikan dengan larutan asam klorida sesuai reaksi:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)
Jika gas hidrogen yang dihasilkan dalam keadaan STP adalah 2,24 L, berapa massa seng (Ar Zn = 65) yang direaksikan?
0,65 gr
6,5 gr
8 gr
13,5 gr
65 gr
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