practice word equations:
name each of the compounds under the question.
then, draw the lewis diagrams and balance. don’t forget the states of matter!
1. sodium chloride and fluorine gas make sodium fluoride and chlorine gas.

2. the combustion of methane: ch₄ plus oxygen releases carbon dioxide and water

3. silver oxide (ag₂o) decomposes into silver metal and oxygen gas.

balancing chemical equations:
complete the following equations with the coefficients.
4. ____ kclo₃ → ____ kcl + ____ o₂

5. ____ pb(oh)₂ + ____ hcl → ____ h₂o + ____ pbcl₂

6. ____ albr₃ + ____ k₂so₄ → ____ kbr + ____ al₂(so₄)₃

7. ____ c₃h₈ + ____ o₂ → ____ co₂ + ____ h₂o

8. ____ c₈h₁₈ + ____ o₂ → ____ co₂ + ____ h₂o

remember:
1. draw a line to separate the reactants and products.
2. number the atoms present on each side.
3. balance → (hint: metals first, then non metals, then o, then h last!)
don’t forget to check to see if you satisfied the law of conservation of mass!

Question

practice word equations:
name each of the compounds under the question.
then, draw the lewis diagrams and balance. don’t forget the states of matter!
1. sodium chloride and fluorine gas make sodium fluoride and chlorine gas.

2. the combustion of methane: ch₄ plus oxygen releases carbon dioxide and water

3. silver oxide (ag₂o) decomposes into silver metal and oxygen gas.

balancing chemical equations:
complete the following equations with the coefficients.
    4. ____ kclo₃ → ____ kcl + ____ o₂

5. ____ pb(oh)₂ + ____ hcl → ____ h₂o + ____ pbcl₂

6. ____ albr₃ + ____ k₂so₄ → ____ kbr + ____ al₂(so₄)₃

7. ____ c₃h₈ + ____ o₂ → ____ co₂ + ____ h₂o

8. ____ c₈h₁₈ + ____ o₂ → ____ co₂ + ____ h₂o

remember:
1. draw a line to separate the reactants and products.
2. number the atoms present on each side.
3. balance → (hint: metals first, then non metals, then o, then h last!)
don’t forget to check to see if you satisfied the law of conservation of mass!

Accepted Answer

### Problem 4:
# Explanation:
## Step1: Identify atoms
Reactants: K=1, Cl=1, O=3; Products: K=1, Cl=1, O=2.
## Step2: Balance O
Find LCM of 3 and 2, which is 6. So multiply $ KClO_3 $ by 2, $ O_2 $ by 3.
$ 2KClO_3
ightarrow KCl + 3O_2 $
## Step3: Balance K and Cl
Multiply $ KCl $ by 2.
$ 2KClO_3
ightarrow 2KCl + 3O_2 $
# Answer:
2, 2, 3

### Problem 5:
# Explanation:
## Step1: Identify atoms
Reactants: Pb=1, O=2, H=3, Cl=1; Products: H=2, O=1, Pb=1, Cl=2.
## Step2: Balance Cl
Multiply $ HCl $ by 2.
$ Pb(OH)_2 + 2HCl
ightarrow H_2O + PbCl_2 $
## Step3: Balance H and O
Now H: 2 + 2 = 4, O: 2. Products: H in $ H_2O $ should be 4, so multiply $ H_2O $ by 2.
$ Pb(OH)_2 + 2HCl
ightarrow 2H_2O + PbCl_2 $
# Answer:
1, 2, 2, 1

### Problem 6:
# Explanation:
## Step1: Identify atoms
Reactants: Al=1, Br=3, K=2, S=1, O=4; Products: K=1, Br=1, Al=2, S=3, O=12.
## Step2: Balance Al
Multiply $ AlBr_3 $ by 2.
$ 2AlBr_3 + K_2SO_4
ightarrow KBr + Al_2(SO_4)_3 $
## Step3: Balance SO₄²⁻
Multiply $ K_2SO_4 $ by 3.
$ 2AlBr_3 + 3K_2SO_4
ightarrow KBr + Al_2(SO_4)_3 $
## Step4: Balance K and Br
Multiply $ KBr $ by 6.
$ 2AlBr_3 + 3K_2SO_4
ightarrow 6KBr + Al_2(SO_4)_3 $
# Answer:
2, 3, 6, 1

### Problem 7:
# Explanation:
## Step1: Identify atoms
Reactants: C=3, H=8, O=2; Products: C=1, H=2, O=3.
## Step2: Balance C
Multiply $ CO_2 $ by 3.
$ C_3H_8 + O_2
ightarrow 3CO_2 + H_2O $
## Step3: Balance H
Multiply $ H_2O $ by 4.
$ C_3H_8 + O_2
ightarrow 3CO_2 + 4H_2O $
## Step4: Balance O
O in products: 3×2 + 4×1 = 10. So multiply $ O_2 $ by 5.
$ C_3H_8 + 5O_2
ightarrow 3CO_2 + 4H_2O $
# Answer:
1, 5, 3, 4

### Problem 8:
# Explanation:
## Step1: Identify atoms
Reactants: C=8, H=18, O=2; Products: C=1, H=2, O=3.
## Step2: Balance C
Multiply $ CO_2 $ by 8.
$ C_8H_{18} + O_2
ightarrow 8CO_2 + H_2O $
## Step3: Balance H
Multiply $ H_2O $ by 9.
$ C_8H_{18} + O_2
ightarrow 8CO_2 + 9H_2O $
## Step4: Balance O
O in products: 8×2 + 9×1 = 25. So multiply $ O_2 $ by $ \frac{25}{2} $, but use integers. Multiply all by 2.
$ 2C_8H_{18} + 25O_2
ightarrow 16CO_2 + 18H_2O $
# Answer:
2, 25, 16, 18

### Problem 7 (Wait, original problem 7 was $ C_3H_8 + O_2
ightarrow CO_2 + H_2O $, already solved. Problem 8 is $ C_8H_{18} + O_2
ightarrow CO_2 + H_2O $, solved above. Let's check problem 2 (combustion of methane):

### Problem 2:
# Explanation:
## Step1: Write unbalanced equation
$ CH_4 + O_2
ightarrow CO_2 + H_2O $
## Step2: Balance C (already 1 on each side)
## Step3: Balance H
Multiply $ H_2O $ by 2.
$ CH_4 + O_2
ightarrow CO_2 + 2H_2O $
## Step4: Balance O
O in products: 2 + 2 = 4, so multiply $ O_2 $ by 2.
$ CH_4 + 2O_2
ightarrow CO_2 + 2H_2O $
# Answer:
1, 2, 1, 2

### Problem 3:
# Explanation:
## Step1: Write unbalanced equation
$ Ag_2O
ightarrow Ag + O_2 $
## Step2: Balance O
Multiply $ Ag_2O $ by 2.
$ 2Ag_2O
ightarrow Ag + O_2 $
## Step3: Balance Ag
Multiply $ Ag $ by 4.
$ 2Ag_2O
ightarrow 4Ag + O_2 $
# Answer:
2, 4, 1

### Problem 1:
# Explanation:
## Step1: Write unbalanced equation
$ NaCl + F_2
ightarrow NaF + Cl_2 $
## Step2: Balance Cl
Multiply $ NaCl $ by 2.
$ 2NaCl + F_2
ightarrow NaF + Cl_2 $
## Step3: Balance Na and F
Multiply $ NaF $ by 2 and $ F_2 $ by 1 (already balanced F? Wait, F: 2 on left, 2 on right (2NaF has 2F). Wait, correct:
$ 2NaCl + F_2
ightarrow 2NaF + Cl_2 $
# Answer:
2, 1, 2, 1 (coefficients for $ NaCl $, $ F_2 $, $ NaF $, $ Cl_2 $)

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Problem 4:

Step1: Identify atoms

Step2: Balance O

Step3: Balance K and Cl

Step1: Identify atoms

Step2: Balance Cl

Step3: Balance H and O

Step1: Identify atoms

Step2: Balance Al

Step3: Balance SO₄²⁻

Step4: Balance K and Br

Answer:

Problem 5: