Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the...

Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.

A) 1.8×10^−2 M CaCl2

B) 2.1×10^−3 M Fe(NO3)2

C)1.8×10^−3 M MgBr2

Expert Solution

queen_honey_blossom answered 2 years ago

A solution containing a mixture of metal cations was treated with dilute HCl and a precipitate...

A solution containing a mixture of metal cations was treated with dilute HCl and a precipitate formed. The solution was filtered and H2S was bubbled through the acidic solution. A precipitate again formed and was filtered off. Then, the pH was raised to about 8 and H2S was again bubbled through the solution. This time, no precipitate formed. Finally, the solution was treated with a sodium carbonate solution, which resulted in formation of a precipitate. Which metal ions were definitely...

Will iron(III) hydroxide precipitate from a pH = 1.00 solution with [Fe3+] = 1.0 x 10^-5?...

Will iron(III) hydroxide precipitate from a pH = 1.00 solution with [Fe3+] = 1.0 x 10^-5? Ksp Fe(OH)3 = 6.3 x 10^-38

1. An aqueous solution of potassium hydroxide is standardized by titration with a 0.117 M solution...

1. An aqueous solution of potassium hydroxide is standardized by titration with a 0.117 M solution of hydrobromic acid. If 18.7 mL of base are required to neutralize 15.7 mL of the acid, what is the molarity of the potassium hydroxide solution? 2. .An aqueous solution of nitric acid is standardized by titration with a 0.183 M solution of calcium hydroxide. If 28.5 mL of base are required to neutralize 21.4 mL of the acid, what is the molarity of...

A.What concentration of potassium hydroxide is needed to give an aqueous solution with a pOH of...

A.What concentration of potassium hydroxide is needed to give an aqueous solution with a pOH of 3.720? Molarity of potassium hydroxide = B.What concentration of sodium hydroxide is needed to give an aqueous solution with a pH of 9.210? Molarity of sodium hydroxide =

When a solution of potassium iodide is mixed with a solution of lead nitrate, a bright yellow solid precipitate forms.

When a solution of potassium iodide is mixed with a solution of lead nitrate, a bright yellow solid precipitate forms. Calculate the mass of the solid produced (molar mass = 461 g/mol) when starting with a solution containing 141.00 g of potassium iodide (molar mass = 166 g/mol), assuming that the reaction goes to completion. Give your answer to three significant figures. 2KI (aq) + Pb(NO3)2 (aq) → PbI2 (s) + 2KNO3 (l)

How many moles of potassium chloride must be added to the solution to completely precipitate 1.18g...

How many moles of potassium chloride must be added to the solution to completely precipitate 1.18g dissolved Ag?

Aqueous potassium phosphate is added to 545 mL of a solution containing calcium chloride to precipitate...

Aqueous potassium phosphate is added to 545 mL of a solution containing calcium chloride to precipitate all of the Ca2+ ions as the insoluble phosphate (310.2 g/mol). If 4.51 g calcium phosphate is produced, what is the Ca2+ concentration in the calcium chloride solution in g/L?

When sodium hydroxide, NaOH, solution is added to Part B of the copper cycle, precipitate does...

When sodium hydroxide, NaOH, solution is added to Part B of the copper cycle, precipitate does not immediately form. What else is present in the reaction mixture from the first part of the cycle that causes this? Is it nitric acid?

Determine the volume (in mL) of 0.442 M potassium hydroxide (KOH) that must be added to...

Determine the volume (in mL) of 0.442 M potassium hydroxide (KOH) that must be added to 475 mL of 0.0992 M ascorbic acid (C5H7O4COOH) to yield a pH of 3.89. Assume the 5% approximation is valid and report your answer to 3 significant figures. A table of pKa values can be found here.

A student is asked to standardize a solution of potassium hydroxide. He weighs out 0.965 g...

A student is asked to standardize a solution of potassium hydroxide. He weighs out 0.965 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 25.9 mL of potassium hydroxide to reach the endpoint. A. What is the molarity of the potassium hydroxide solution? _________M This potassium hydroxide solution is then used to titrate an unknown solution of hydrochloric acid. B. If 21.5 mL of the potassium hydroxide solution is required to neutralize 27.7 mL of hydrochloric...

Question