Question

And two or more complete sentences explain how to balance the chemical equation and classify its reaction type.

__H3PO4 + __NaBr —> __HBr + ___Na3PO4

Answer 1

H₃PO₄ + 3NaBr → 3HBr + Na₃PO₄

Step-by-step explanation:

The unbalanced reaction expression is given as:

H₃PO₄ + NaBr → HBr + Na₃PO₄

We need to balance the expression.

Let us assign variable a, b, c and d and solve mathematically;

aH₃PO₄ + bNaBr → cHBr + dNa₃PO₄

Conserving H : 3a = c

P: a = d

O : 4a = 4d

Na: b = 3d

Br: b = c

Let a = 1, c = 3, d = 1, b = 3

So:

H₃PO₄ + 3NaBr → 3HBr + Na₃PO₄