Chem.1 Part A: Choose all that apply Part B: Choose all that apply Which of the

Question

Chem.1

Part A: Choose all that apply

Part B: Choose all that apply

Which of the following aqueous solutions are good buffer systems? 0.12 M potassium hdroxide + 0.23 M potassium chloride 0.32 M ammonia + 0.34 M ammonium bromide 0.15 M hydrocyanic acid + 0.18 M nitric acid 0.38 M calcium nitrate + 0.28 M barium nitrate 0.23 M perchloric acid + 0.23 M sodium perchlorate Which of the following aqueous solutions are good buffer systems? 0.15 M hypochlorous acid + 0.12 M sodium hypochlorite 0.32 M hydrofluoric acid + 0.29 M sodium fluoride 0.26 M ammonium bromide + 0.31 M ammonia 0.20 M barium hydroxide + 0.21 M barium bromide 0.28 M perchloric acid + 0.18 M potassium perchlorate

Explanation / Answer

answer

weak acid and its salt with stong base is acid buffer solution

weak base and its salt with strong acid is basic buffer solution

following aquous solutions are good buffer solutions

Part -A

hypochlours acid +sodium hypochlorite

HOCl is weak acid + NaOCl salt with strong base is good buffer solution

Hydroflouric acid +sodium flouride

HF is weak acid + NaF salt with strong base is good buffer solution

Ammounium bromide + ammonia

NH3 is weak base + NH4Br is salt with strong acid is good buffer solution

Barium hydroxide +barium bromide is not buffer solution

Ba(OH)2 is stong base + BaBr2 is salt with stong acid . so it is not buffer solution

perchloric acid + potassium perchlorate is not buffer solution

HClO4 is strong acid + KClO4 is salt with strong base . so it is not buffer solution

Part -B

potassiu hydroxide + potassium chloride is not buffer solution

KOH is strong base + KCl is salt of strong acid. so it is not buffer solution

Ammounium bromide + ammonia

NH3 is weak base + NH4Br is salt with strong acid is good buffer solution

hydrocyanic acid + nitric acid is not buffer solution

HCN Is weak acid + HNO3 is strong acid two are acids . so this mixture is not buffer solution

Calcium nitrate + barium nitrate is not buffer solution

Ca(NO3)2 is salt + Ba(NO3)2 is salt both are salts . so it is not buffer solution

perchloric acid + potassium perchlorate is not buffer solution

HClO4 is strong acid + KClO4 is salt with strong base . so it is not buffer solution

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.