Question

Consider the neutralization reaction 2 HNO, (aq) + Ba(OH),(aq) — 2H,O(1) + Ba(NO),(aq) A 0.110 L sample of an unknown HNO, solution required 42.9 mL of 0.200 M Ba(OH), for complete neutralization. What is the concentration of the HNO, solution? concentration: 0.039

Answer 1

1)

Balanced chemical equation is:

Ba(OH)2 + 2 HNO3 ---> Ba(NO3)2 + 2 H2O

Here:

M(Ba(OH)2)=0.2 M

V(Ba(OH)2)=42.9 mL

V(HNO3)=0.110 L = 110 mL

According to balanced reaction:

2*number of mol of Ba(OH)2 =1*number of mol of HNO3

2*M(Ba(OH)2)*V(Ba(OH)2) =1*M(HNO3)*V(HNO3)

2*0.2*42.9 = 1*M(HNO3)*110.0

M(HNO3) = 0.156 M

Answer: 0.156 M

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