Balanced chemical equation is:
Ca(OH)2 + 2 HNO3 ---> Ca(NO3)2 + 2 H2O
Here:
M(Ca(OH)2)=0.17 M
V(Ca(OH)2)=28.6 mL
V(HNO3)=15.7 mL
According to balanced reaction:
2*number of mol of Ca(OH)2 =1*number of mol of HNO3
2*M(Ca(OH)2)*V(Ca(OH)2) =1*M(HNO3)*V(HNO3)
2*0.17*28.6 = 1*M(HNO3)*15.7
M(HNO3) = 0.6194 M
Answer: 0.619 M
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