Question

An aqueous solution containing 6.51 g NaOH is added to an aqueous solution containing 19.3 g H3PO4. (a) Write a balanced equation for the acid-base reaction that should occur. (Include physical states.)

Answer 1

Balanced chemical equation:

3NaOH)aq) + H₃PO₄(aq) → Na₃PO₄(aq) + 3H₂O(l)

Step-by-step explanation:

Chemical equation:

NaOH)aq) + H₃PO₄(aq) → Na₃PO₄ + H₂O

Balanced chemical equation:

3NaOH)aq) + H₃PO₄(aq) → Na₃PO₄(aq) + 3H₂O(l)

How to balance:

NaOH)aq) + H₃PO₄(aq) → Na₃PO₄ + H₂O

Na = 1 Na = 3

O = 5 O = 5

H = 4 H = 2

P = 1 P = 1

Next:

3NaOH)aq) + H₃PO₄(aq) → Na₃PO₄ + H₂O

Na = 1 × 3 Na = 3

O = 4 + 3=7 O = 5

H = 3 + 3 = 6 H = 2

P = 1 P = 1

Next:

3NaOH)aq) + H₃PO₄(aq) → Na₃PO₄ + 3H₂O

Na = 1 × 3 Na = 3

O = 4 + 3=7 O = 4+ 3= 7

H = 3 + 3 = 6 H = 3 × 2 = 6

P = 1 P = 1