Zn(OH)2(s)−⇀↽−Zn2+(aq)+2OH−(aq)Zn(OH)X2(s)↽−−⇀ZnX2+(aq)+2OHX−(aq)   If you have a saturated solution at equilibrium, what changes could you make to increase the solubility of the compound?     Increase the temperature   Add  HCl(aq)HCl(aq)   Add  Zn(OH)2(s)Zn(OH)X2(s)   Add  NaOH(aq)

If you wanted to create a buffer with a pH = 3.2, what substances would you choose to make the buffer? Weak Acid K, pK, HCIO, 7.2 x 10-3 1.94 HNO, CH,COOH H,CO, 4.0 x 10-4 3.39 1.8 x 10-5 4.75 6.3 x 10-8 6,35 HBRO 2.8 x 10-9 8.55 HCO, 4.0 x 10-13 10.33 HNO, and NO, CH;COOH only HNO, only HCO; and CO,2 HBГО and BrO HCIO, and CIO, CH3COOH and CH;COO

What is the molar solubility of a saturated solution of calcium hydroxide, Ca(OH)2, in water? The Ksp of Ca(OH)2 is 1.2×10–11.   Options:  1.4×10–4 1.8×10–4 3.4×10–6 3.6×10–4

When Fe(OH)3 is added to 1.0 M HSCN, the following reaction occurs. Given that the pKa of HSCN is 1.1 and Kf for Fe(SCN)3 is 2.0x10^6, Fe(OH3)3(s)+ 3HSCN(aq)⇌Fe(SCN)3(aq)+ 3H2O(l) a.Calculate K for the reaction. b.Calculate the molar solubility of Fe(OH)3 in 1.0 M HSCN. c.Calculate the equilibrium [HSCN] and [Fe(SCN)3].

A generic salt, AB, has a molar mass of 229 g/mol and a solubility of 5.70 g/L at 25 °C.   AB(s)↽−−⇀A+(aq)+B−(aq)   What is the ?sp of this salt at 25 °C?

What is the molar solubility of a saturated solution of magnesium hydroxide, Mg(OH)2, in water? The Ksp of Mg(OH)2 is 1.2x10-11. 1.4x10-4 1.8×10-4 3.6x10-4 3.4x10-6

titration of acetic acid: what is the pH after 10.00mL sodium hydroxide solution are added? the mL base needed to reach equivalence point: 25.5 mL

-4 = A chemistry graduate student is given 500. mL of a 0.20M nitrous acid (HNO₂) solution. Nitrous acid is a weak acid with K = 4.5 × 10 What mass of NaNO₂ should the student dissolve in the HNO₂ solution to turn it into a buffer with pH = 3.46? You may assume that the volume of the solution doesn't change when the NaNO₂ is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. [] x10 Ś