Questions from General Chemistry

Q: A 0.4723-g sample of primary-standard-

A 0.4723-g sample of primary-standard-grade Na2CO3 required 34.78 mL of an H2SO4 solution to reach the end point in the reaction CO3 22 + 2H1 → H2O + CO21g2 What is the molar concentration of the H2...

Q: Calculate the molar solubility of MnS (pink) in a solution

Calculate the molar solubility of MnS (pink) in a solution with a constant 3H3O14 of a. 3.00 × 10-5 M b. 2.50 × 10-7 M

Q: Calculate the molar solubility of ZnCO3 in a solution buffered to a

Calculate the molar solubility of ZnCO3 in a solution buffered to a pH of 7.00.

Q: Calculate the molar solubility of ZnCO3 in a solution buffered to a

Calculate the molar solubility of ZnCO3 in a solution buffered to a pH of 7.50.

Q: Sir William Ramsey (Lord Rayleigh) prepared nitrogen samples by several

Sir William Ramsey (Lord Rayleigh) prepared nitrogen samples by several different methods. The density of each sample was measured as the mass of gas required to fill a particular flask at a certain t...

Q: Calculate the solubility-product constant for each of the following substances

Calculate the solubility-product constant for each of the following substances, given that the molar concentrations of their saturated solutions are as indicated:

Q: Dilute NaOH is introduced into a solution that is 0.050

Dilute NaOH is introduced into a solution that is 0.050 M in Cu21 and 0.040 M in Mn21. a. Which hydroxide precipitates first? b. What OH2 concentration is needed to initiate precipitation of the fir...

Q: A solution is 0.030 M in Na2SO4 and 0.

A solution is 0.030 M in Na2SO4 and 0.040 M in NaIO3.To this is added a solution containing Ba21. Assuming that no HSO4 - is present in the original solution, a. which barium salt will precipitate fi...

Q: Silver ion is being considered for separating I- from SCN-

Silver ion is being considered for separating I- from SCN- in a solution that is 0.040 M in KI and 0.080 M in NaSCN. a. What Ag1 concentration is needed to lowerthe I- concentration to 1.0 × 10-6 M?...

Q: Using 1.0 × 10-6 M as the criterion

Using 1.0 × 10-6 M as the criterion for quantitative removal, determine whether it is feasible to use a. SO4 22 to separate Ba21 and Sr21 in a solution that is initially 0.030 M in Sr21 and 0.15 M in...