C) Ca(CO412 D Cull E) None of the above will be more soluble in acidic solution.
ID: 513611 • Letter: C
Question
C) Ca(CO412 D Cull E) None of the above will be more soluble in acidic solution. 14. Which of the following is a weak diprotic acid? A) HNO3 B) H3PO4 C) H2SO3 D) HCIO4 E) H2SO4 17. Which of the following 0.10 M aqueous solutions will be basic? A) NH4CIO4 B) NaCN C) KNO3 DyHzC204 E) all are acidic or neutral 18. Which of the following 0.10 M aqueous solutions will be neutral? A) NH4CIO4 B) NaCN C) KNO3 D)HzC204 E) all are acidic or basic B. In the following parts of question B, solutions in parts a & b are not related-look at each as a fresh solution. a. Assuming no volume change on mixing, what mass of NHeCI (MM- 53.453) should be added to 1.000L of 0.250 M ammonia to produce a solution of pH 9.350? [Kb for ammonia is 1.80 x 10 5] g NHaci b. What is the pH after addition of 10.0 mL of 1.0 M sodium hydroxide (NaOH) to 90.0 mL of a 1.00 M NHa 1.00 M NH4* buffer? Kb for ammonia is 1.80 x 10-51 pH C. a. What is the molar solubility of BaFi in pure water? Give an answer in molL For BaF, Ksp 1.7 x 10-6. Solubility BaF2Explanation / Answer
14) answer is (C)
Diprotic acid refers to those acids that can liberate two protons. Here, there are two diprotic acids, namely H2SO4 and H2SO3. H2SO4 is a strong acid, and H2SO3 is weak. Strong acids are those acids that dissociate completely into H+ and corresponding anions in slolution, whereas weak acids do not completely dissociate into ions. There is always an equlibrium between dissociated ions and undissociated acid in case of weak acids.
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