Nguyen Tien Thao, Faculty of Chemistry, Hanoi College of Science, VNU 19 - Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam.. Email: nguyentienthao@gmail.com 1 Chapter 15: Applications of aqueou
Trang 1Nguyen Tien Thao, Faculty of Chemistry, Hanoi College of Science, VNU
19 - Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Email: nguyentienthao@gmail.com
1
Chapter 15: Applications of aqueous equilibria (CHEM 2B)
15.1 Calculate the pH:
(b) After adding 0.020 mol of solid NaOH to 1.0 L of the buffer solution in part (a) (c) After adding 0.020 mol of HCI to 1.0 L of the buffer solution in part (a) Ka of
15.2 Calculate the pH of a buffer consisting of 0.5 M HF and 0.45 F- (a) after
15.3 An environmental chemist needs a carbonate buffer of pH 10.00 to study the
15.4 How would you prepare a benzoic acid-benzoate buffer with pH = 4.25,
15.5 Calculate the pH during the titration of 40.00 mL of 0.1000 M propanoic acid
15.6 A chemist titrates 20.00 mL of 0.2000 M HBrO (Ka = 2.3xl0-9) with 0.1000 M
HBrO originally present? (e) Sketch the titration curve
15.7 (a) Lead(II) sulfate (PbSO4) is a key component in lead-acid car batteries Its
15.8 When powdered fluorite (CaF2) is shaken with pure water at 1 8°C, 1.5xl0-4g
15.9 Calcium hydroxide (slaked lime) is a major component of mortar, plaster, and
Trang 2Nguyen Tien Thao, Faculty of Chemistry, Hanoi College of Science, VNU
19 - Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Email: nguyentienthao@gmail.com
2
15.10 A suspension of Mg(OH)2in water is marketed as “milk of magnesia”, which
is too low to harm the mouth and throat, but the suspension dissolves in the acidic
water?
15.11 A common laboratory method for preparing a precipitate is to mix solutions
containing the component ions Does a precipitate form when 0.100L of 0.30 M
15.12 As a result of mineral erosion and biological activity, phosphate ion is
common in natural waters, where it often precipitates as insoluble salts, such as
Ca3(PO4)2 If [Ca2+] = [PO4
15.13 In black-and-white film developing, excess AgBr is removed from the film
15.14 How does the solubility of AgBr in 1.0 M compare with its solubilty in hypo?
+
is 1.7 x 107
15.15 Does any solid Cu(OH)2 form when 0.075 g of KOH is dossolved in 1.0 L of
15.16 Find the pH and volume (mL) of 0.0372M NaOH needed to reach the
equivalence point in titrations of
15.17 Find the solubility of AgI in 2.5 M NH3 (Ksp of AgI = 8.3 x 10-17; Kf of
+
15.18 Copper (I) bromide has a measured solubility of 2.0 x10-4 mol/L at 25°C
15.20 A solution is prepared by adding 750.0 mL of 4.00 x10-3 M Ce(NO3)3 to
this solution?
Additional problems:
Chapter 15: 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 81, 83, 85, 87 All students must complete at leat ….%, Deadline: …