Question

# 3,8,9

esep donates a Short Answer Questions: Worth 3.5 points each 1. In the reaction H.CO; +H:0 HCO3 + H0", the Brønsted acids are a. H:CO, and H:0 1:0 and H:Coc. HCO3 and H:CO, d. H:CO, and HCO3 2. Which one of these statements about strong acids is true? aAll strong acids have H atoms bonded to electronegative oxygen atoms b. Strong acids are 100% ionized in water Strong acids are very concentrated acids Strong acids produce solutions with a higher pH than weak acids 3 A 10L buffer solution is 0.250 M HC,H,O2 and 0.050 M LiC:H:02. Which of the following actions will destroy the buffer? a. adding 0.050 moles of NaOH b. adding 0.050 moles of HCI c. adding 0.050 moles of LICH:02 d. adding 0.050 moles of HC.H.O. 4. What is the pH of 10.0 ml of 0.0020 M HCI? a. 0.70 b. 2.70 c. 3.70 d. 5.70 0911 TA 5. Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.6. How many times greater is the H.O concentration in diet cola than in milk? a. 4.0 times higher in milk than in diet cola b. 100 times higher in diet cola than in milk c. 1,000 times higher in milk than in diet cola d. 10.000 times higher in diet cola than in milk 6. Acid strength decreases in the series HI HSO > HF > HCN. Which of these anions is the weakest base? b. SO2- CF d. CN- 7. Which of these species will act as a Lewis acid? aceto e | 4 NHÀ | b. NHÀ & H 0. 6. BF 8. The Kop for silver(1) phosphate is 1.8 x 10-5. Calculate the molar solubility of silver(1) phosphate. info --Рn @ 1.6 x 10'M b. 7.2 x 10-M c. 2.1 x 10' M d . 3.7 x 10 M 20s 7, 9. For H3PO4, K.1 = 7.3 x 10-K2=6.2 x 106, and K3 = 4.8 x 10-3. An aqueous solution of NaH;PO, therefore would be a. neutral Cacidic highly acidic

Answer 1

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