Suppose you have a solution that might contain any or all of the following cations: Cu2+, Ag , Ba , and Mn2 . The addition of HBr causes a precipitate to form. After the precipitate is separated by filtration, H2S04 is added to the supernatant liquid, and another precipitate forms. This precipitate is separated by filtration, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates? Which cations are not present in the original solution?

A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 30. mg of oxalic acid (H,C,0,), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 62.3 mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Round your answer to 2 significant digits. x10

In the laboratory you are given the task of separating Ba2+ and Zn2+ ions in aqueous solution.For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No" Y or N Reagent Formula of Precipitate if YES 1. fill in the blank 1 NaOH   2. fill in the blank 3 KBr   3. fill in the blank 5 Na2CO3

In the laboratory you are given the task of separating Ag+ and Co2+ ions in aqueous solution.For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No Y or N Reagent Formula of Precipitate if YES 1. fill in the blank 1 NaOH   2. fill in the blank 3 Na2CO3   3. fill in the blank 5 NaI

A relatively common winemaking problem is the presence of hydrogen sulfide (H2S(aq)) in the wine. You know it when its there because hydrogen sulfide smells like rotten eggs and it only takes a tiny amount of it to make the wine stinky. One thing that is sometimes used to remedy the situation is the addition of copper(II) sulfate. This immobilizes the sulfide ions in the form of an insoluble product, CuS(s), that can then be removed by filtration. Given the density of wine as 0.967 g/mL, if 5.0 gallons of wine contains 25 ppm of H2S, what mass of copper(II) sulfate pentahydrate must be added to remove the smell by precipitation of all of the sulfide ions?

A 160.0 mL solution of 3.130 M strontium nitrate is mixed with 220.0 mL of a 3.361 M sodium fluoride solution. Calculate the mass of the resulting strontium fluoride precipitate. 43.1 mass: Incorrect Assuming complete precipitation, calculate the final concentration of each ion. Ksp values can be found in the table of solubility product constants. 1.87 [Na*] = M Incorrect [NO,] = 2.67 M 0.39 [Sr²*] M Incorrect [F] = M

You have a solution that is either CuCl2 (aq) or Cu(NO3)2 (aq).  You add some KOH (aq) and a solid precipitate is formed.  Does this test allow you to determine the contents of your solution?    If so, how?  If not, what other test could you perform that would give you the information that you need?  Please explain.

In the laboratory you are given the task of separating Ba2+ and Zn2+ ions in aqueous solution. For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No" Y or N Reagent Formula of Precipitate if YES 1. fill in the blank 1 Na2CO3 2. fill in the blank 3 Na2SO4 3. fill in the blank NaBr

n the laboratory you are given the task of separating Ca2+ and Ag+ ions in aqueous solution.For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No" Y or N Reagent Formula of Precipitate if YES 1. fill in the blank 1 K2SO4   2. fill in the blank 3 HBr   3. fill in the blank 5 Na2CO3

If 20.0 g of LiOH is added to 0.750 L of 1.00 M Cd(NO₃)₂, how many grams of precipitate will be formed in the following precipitation reaction?    a) Write a balanced equation. Identify a precipitate. Include states of matter.  b) Determine how much precipitate would form if all reactant 1 ( LiOH) would be used up.  c) Determine how much precipitate would form if all reactant 2 ( Cd(NO3 )2 would be used up.  d) State Limiting reactant , and theoretical yield ( in grams) of the precipitate that would form from the given amounts.