Question

A1(OH)3 + HNO3–> H2O + A1(NO3)3

when the equation above is correctly balanced the coefficient of H2O is

A:1
B:2
C:3
D:8

Answer 1

3

Step-by-step explanation:

The reaction expression is given as:

Al(OH)₃ + HNO₃ → H₂O + Al(NO₃)₃

To solve this problem, let us assign coefficient a,b,c and d to each specie;

aAl(OH)₃ + bHNO₃ → cH₂O + dAl(NO₃)₃

Conserving Al : a = d

O: 3a + 3b = c + 9d

H: 3a + b = 2c

N: b = 3d

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

Multiply through by 3;

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

Al(OH)₃ + 3HNO₃ → 3H₂O + Al(NO₃)₃