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Persamaan reaksi kimia

Total questions: 12

Worksheet time: 20mins

Name
Class
Date
1.
An element plus additional element reacts to form one product is an example of which type of chemical reaction? 
a)
combustion
b)
decomposition 
c)
synthesis 
d)
single replacement
2.
Describes the number of molecules in a compound and is used to balance a chemical reaction. 
a)
coefficient 
b)
subscript
c)
superscript
d)
SI unit
3.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
4.
What are the correct coefficients when this equation is balanced?
KClO3  --> KCl  +  O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
5.
Describes the number of atoms in a compound of each element. 
a)
coefficient 
b)
superscript 
c)
subscript 
d)
SI unit 
6.
Which reaction between halogens and halide salts will occur?
a)
F2(g)  +  FeI2(aq) → FeF2(aq)  +  I2 (g)
b)
Cl2(g) + SrF2(aq)  → SrCl2(aq)  +  F2(g)  
c)
I2(g)  + MgBr2(aq)  → MnI2(aq)  + Br2(g)
d)
Br2(l)  +  CoCl2(aq) → CoBr2(aq)  +  Cl2(g)
7.

Koefisien dari reaksi MnO2 + HCl → MnCl2 + H2O + Cl2 secara berturut-turut dari kiri ke kanan adalah ...

a)

1, 2, 4, 2, 1

b)

1, 2, 2, 2, 1

c)

1, 4, 1, 2, 1

d)

2, 1, 4, 2, 1

e)

2, 4, 2, 4, 1

8.

pCa(OH)2 + qH2PO4 → Ca3(PO4)2 + rH2O merupakan reaksi sempurna bila harga p, q, dan r adalah...

a)

2, 2, 4

b)

3, 2, 4

c)

2, 3, 4

d)

2, 3, 6

e)

3, 2, 6

9.

Al(OH)3 + H2SO4 → Al2(SO4) 3 + H2O. Koefisien dari persamaan reaksi tersebut adalah ...

a)

1, 2, 3, 6

b)

2, 3, 1, 6

c)

1, 3, 2, 6

d)

3, 2, 1, 6

e)

3, 1, 2, 6

10.

ZnS + O2 → ZnO + SO2. Setelah persamaan reaksi disetarakan, koefisien reaksi dari kiri ke kanan berturut-turut adalah ...

a)

2, 3, 2, 2

b)

2, 2, 3, 2

c)

1, 3, 1, 1

d)

2, 3, 2, 1

e)

1, 1, 2, 1

11.

Serbuk tembaga (II) oksida larut dalam asam klorida membentuk tembaga (II) klorida dan air. Persamaan reaksi setara dan lengkap dari reaksi tersebut adalah ....

a)

Cu2O (s) + HCl (aq) → Cu2Cl (aq) + H2O (l)

b)

Cu2O (s) + 2 HCl (aq) → 2 Cu2Cl (aq) + H2O (l)

c)

CuO (s) + HCl (aq) → CuCl (aq) + H2O (l)

d)

CuO (s) + 2 HCl (aq) → CuCl2 (aq) + H2O (l)

e)

Cu2O (s) + 4 HCl (aq) → 2 CuCl2 (aq) + 4 H2O (l)

12.

Diketahui persamaan reaksi:

2 Al(s) + 6 HCl(aq) --> 2 AlCl3(aq) + 3 H2(g)

Dari persamaan reaksi di atas, yang merupakan reaktan adalah ....

a)

Al dan H2

b)

HCl dan AlCl3

c)

Al dan HCl

d)

Al dan AlCl3

e)

AlCl3 dan H2

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