Question

1. what coefficients would correctly balance this equation?

na₃po₄ + koh → naoh + k₃po₄

a. 1, 3, 1, 3
b. 1, 1, 3, 1
c. 1, 3, 1, 1
d. 1, 3, 3, 1

1. what coefficients would correctly balance this equation?

mgf₂ + li₂co₃ → mgco₃ + lif

a. 1, 1, 1, 1
b. 2, 1, 1, 2
c. 1, 2, 1, 1
d. 1, 1, 1, 2

Explanation:

Step1: Balance Equation 7 (Na, P, O, H, K)

Unbalanced: $\text{Na}_3\text{PO}_4 + \text{KOH}
ightarrow \text{NaOH} + \text{K}_3\text{PO}_4$

1. Balance Na: Add 3 to $\text{NaOH}$: $\text{Na}_3\text{PO}_4 + \text{KOH}

ightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4$

1. Balance K: Add 3 to $\text{KOH}$: $\text{Na}_3\text{PO}_4 + 3\text{KOH}

ightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4$

1. Verify all atoms: Na(3=3), P(1=1), O(7=7), H(3=3), K(3=3)

Step2: Balance Equation 8 (Mg, F, Li, C, O)

Unbalanced: $\text{MgF}_2 + \text{Li}_2\text{CO}_3
ightarrow \text{MgCO}_3 + \text{LiF}$

1. Balance F: Add 2 to $\text{LiF}$: $\text{MgF}_2 + \text{Li}_2\text{CO}_3

ightarrow \text{MgCO}_3 + 2\text{LiF}$

1. Verify all atoms: Mg(1=1), F(2=2), Li(2=2), C(1=1), O(3=3)

Answer:

1. a. 1, 3, 3, 3
2. d. 1, 1, 1, 2