Name General Chemistry II Read each question carefully. Do not spend too much ti

Question

Name General Chemistry II Read each question carefully. Do not spend too much time on one problem. 1) What is the conjugate base of H2PO4? A) HPO42- B) PO43- C OH D) H3PO4 2) Which of the following is a STRONG acid? A) HCN D) NH4 3) Which of the following solutions would have the most basic plH? Assume that they are all 0.10 M in acid at 25 C. The acid is followed by its Ka value. A) HNO2, 4.6 x 10-4 C) HCHO2, 1.8 x 10-4 B) HF, 3.5 x 10-4 D) HCN, 4.9 × 10-10 4) What is the concentration of hydroxide ions in pure water at 30.0 C, if Kw at this temperature is 1.47 10-142 A) 1.21 x 10-7 M B) 1.00 x 10-7 M C) 8.93 x 10-8 M D) 1.47 x 10-7 M 5) Determine the (OH ] concentration in a 0.634 M solution of NaOH. A) 0.198 MM B) 1.58 x 10-14 M C) 13.37 M D) 0.634 M o Calalate the pol odax104MHho at 25C A) 10.59 B) 9.14 C) 4.59 D) 3.31 7) Determine the pH of a 0.461 M benzoic acid solution. Ka 6.5 x 10-5, A) 5.48 B) 2.26 C) 9.48 D) 4.52 8) Which one of the following will form an acidic solution in water? A) NaF B) KNO3 C) NH4CI D) Lil

Explanation / Answer

Answer (1) conjugate base if formed when the acid looses one proton so when H2PO4- will loose a proton , after loosing a proton it will become HPO4^2-

conjugate base of H2PO4- is  HPO4^2- (option A)

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