Determine the solubility of lead(II) iodide (PbI2), in moles per liter (mol/L), in 0.010 M NaI solution. The Ksp of PbI2 is 1.4 × 10-8.

-10 A chemistry graduate student is given 125. mL of a 1.80 M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K=4.9 × 10, What %3D mass of NaCN should the student dissolve in the HCN solution to turn it into a buffer with pH =9.20? You may assume that the volume of the solution doesn't change when the NACN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

A buffer solution contains 0.89 mol of hypoiodous acid (HIO) and 0.57 mol of sodium hypoiodite (NaIO) in 3.40 L.The Ka of hypoiodous acid (HIO) is Ka = 2.3e-11.(a) What is the pH of this buffer?pH =  (b) What is the pH of the buffer after the addition of 0.17 mol of NaOH? (assume no volume change)pH =  (c) What is the pH of the original buffer after the addition of 0.24 mol of HI? (assume no volume change)pH =

What is the molar solubility of Pb(OH)2 (Ksp = 2.8 x 10−16) in a buffer solution containing the same amount of NH3 and NH4+?  (Kb = 1.8 x 10−5) 7.9 x 10−6 4.3 x 10−6 8.6 x 10−7 1.2 x 10−5 4.3 x 10−7

What is the solubility of PbSO 4 in 0.1868 M Na 2SO 4? K sp(PbSO 4) = 6.300e-7.

-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

A chemistry graduate student is given 450. mL of a 0.90 M propanoic acid (HC,H,Co, solution. Propanoic acid is a weak acid with K, = 1.3 × 10. . What mass of KC,H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH = 4.43? You may assume that the volume of the solution doesn't change when the KC,H,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

a solution contains 0.0036 M Zn^+2 and 0.044 M Fe^+2. A solution containing sulfide ions is added to selectively precipitate one of the metal ions from solution. at what concentration of sulfide ion will a precipitate begin to form? what is the identity of the precipitate? Ksp(Zns)=2.0x10^-25, Ksp(FeS)=6.3x10^-18. a)1.4x10^-16 M, FeS b)1.4x10^-16 M, ZnS c)5.6x10^-24 M, ZnS d)5.6x10^-24 M, FeS e) No precipitate will form at any concentration of sulfide ion.

Use solubility to calculate Ksp- The solubility of Co(OH), is measured and found to be 3.76*10^-4 g/L. Use this information to calculate a Ksp Value for cobalt(Il) hydroxide. Ksp = Calculate solubility in the presence of a common ion. Calculate the solubility of ZnCO3, (a) in pure water and (b) in a solution in which [CO3^2-] = 0.202 M. Solubility in pure water = M Solubility in 0.202 M CO3^2- =M

17. In which of the following solutions, Mn(OH)2 has the greatest solubility? (by assuming sufficient Mn(OH)2 (s) present in solution). Ksp (Mn(OH)2) 2.0 × 10-13. a) 0.20 M HNO3 b) 0.20 M NaNO3 c) b) 0.20 M Mn(NO3)2 e) same solubility for all