Question

In: Chemistry

2 HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2 H2O(l) A 350 mL sample of 0.276 M...

2 HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2 H2O(l)

A 350 mL sample of 0.276 M HNO3 is partially neutralized by 125 mL of 0.120 M Ca(OH)2. Find the concentration of H+ (aq) in the resulting solution.

A. 0.210 M

B. 0.00632 M

C. 0.203 M

D. 0.0240 M

E. 0.140 M

Expert Solution

narmality of HNO3 = n * molarity

= 1*0.276 = 0.276N

normality of Ca(OH)2 = 2*molarity

= 2*0.12 = 0.24N

2 HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2 H2O(l)

HNO3 Ca(OH)2

NA = 0.276N NB = 0.24N

VA = 350ml VB = 125ml

N = NAVA-NBVB/VA+VB

= 0.276*350-0.24*125/350+125

= 66.6/475 = 0.14 N

N = [H+] = 0.14N = 0.14M

E. 0.140 M >>>>answer

queen_honey_blossom answered 2 years ago

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