5) If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 buffer solution is 3.60, which of the following is TRUE? A) [HCHO2]> [NaCHO2] C) [HCHO2] <[NaCHO2] TTOL B) [HCHO2] = [NaCHO2] D) [HCHO2] <<[NaCHO2]

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Question 4:** Which of the following reagents does not affect the percent dissociation of HNO₂?

A) NaNO₂

B) NaCl

C) HCl

D) Ba(NO₂)₂

**Answer:** B) NaCl

---

**Question 5:** If the pKa of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂ buffer solution is 3.60, which of the following is TRUE?

A) [HCHO₂] > [NaCHO₂]

B) [HCHO₂] = [NaCHO₂]

C) [HCHO₂] < [NaCHO₂]

D) [HCHO₂] < [NaCHO₂]
Transcribed Image Text:**Question 4:** Which of the following reagents does not affect the percent dissociation of HNO₂? A) NaNO₂ B) NaCl C) HCl D) Ba(NO₂)₂ **Answer:** B) NaCl --- **Question 5:** If the pKa of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂ buffer solution is 3.60, which of the following is TRUE? A) [HCHO₂] > [NaCHO₂] B) [HCHO₂] = [NaCHO₂] C) [HCHO₂] < [NaCHO₂] D) [HCHO₂] < [NaCHO₂]
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