Question

2 Short Answer Questions: Worth 3.5 points each 1. In the reaction H:CO, + HO HCOS + H0", the Bronsted acids are a. H-COs and H:O 5. H O" and H:CO c. HCOs and H:COs d. H:COs and HCOs 2. Which one of these statements about strong acids is trac All strong acids have H atoms bonded to electronegative oxygen atoms Strong acids are 100 % ionized in water Strong acids are very concentrated acids Strong acids produce solutions with a higher pH than weak acids A 1.0L buffer solution is 0.250 M HC:HO: and 0.050 M LIC:HO2. Which of the following actions will destroy the buffer? a. adding 0.050 moles of NaOH c. adding 0.050 moles of LiCaH0 b. adding 0.050 moles of HC d. adding 0.050 moles of HC:HO 4. What is the pH of 10.0 mL of 0.0020 M HCI? a. 0.70 c. 3.70 d. 5.70 b. 2.70 5. Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.0. How many times greater is the Ha0" concentration in diet cola than in milk? 4.0 times higher in milk than in diet cola b. a. 100 times higher in diet cola than in milk 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 weakest base? HSOr> HF> HCN. Which of these anions is the b. SO c. F d. CN 7. Which of these species will act as a Lewis acid? NH acepis e f b. NH: aBFy H:O 8. The Kp for silver(I) phosphate is 1.8 x 10. Calculate the molar solubility of silver(I) phosphate. 1.6 x 10-5 M 3 POA b. 7.2 x 10 M c. 2.1 x 10 M d. 3.7 x 10 M Ky-21s 9/For HsPOs, K = 7.3 x 10 K2 = 6.2 x 10, and Kas = 4.8 x 10. An aqueous solution of NaH:POs therefore would be a. neutral b. basic acidic highly acidic

Answer 1

o H₂CO₃ + H20 - HCO +130 base acid. base 00% Here Boonsted acids are H2CO3 , Hgo . Strong acids are consed in wate. e All - to top 8 The pH of 10. ml of 0.0020m Hl. I pit= -log Er pti - log 88.002] {2++] = 0.002 M pl.-log 2 x163 pl = 2.69~2.7 dorimek cola milk pht= -log El 3 - log [tt put is = 3. pit 7 " = - Log [11] a 10g (+17 To-logh htt] = 10 Itt a tot - 10,000 times higher in diet cola in milk. 6 HIT H5047 HE> NCH stoong acid conjugated base iswrake HI T O ) Corioaded acid-base Stormy acid weak base. 1) Alth, NH), lebo pre Boounsled acid because it will domates [ut) ions, but BE3 does 't have. Htion, it will attbacks es Samsung BF is Lewis acid.