Dilution (1 Viewer)

[xwrathbringerx]

1. To determine the solubility of calcium hydroxide, a chemist took 25 mL of a saturated calcium hydroxide solution and found that it reacted completely with 8.13 mL of 0.102 mol/L hydrchloric acid. Calculate the molarity of the calcium hydroxide solution and the solubility of calcium hydroxide in g per litre.

2. A solution was made by dissolving 22.22 g of calcium chloride in enough water to make a 500 Ml solution. This was then reacted with 0.5 mol/L sulfuric acid to produce insoluble calcium sulfate. Calculate the volume of sulfuric acid needed to react and the mass of calcium sulfate produced.

3. What mass of insoluble lead bromide is formed when 30 mL of 0.050 mol/L potassium bromide is added to an excess of lead nitrate solution.

4. 50 mL 0.20 mol/L sodium hydroxide was mixed with 50 mL 0.30 mol/L magnesium chloride. A precipitate of magnesium hydroxide was formed. Calculate the concentration of sodium ions, magnesium ions and chloride ions.

Please, any help?

 

[xwrathbringerx]

Hi I've managed to solve the 1st 3. Could someone please help me with the fourth????
<S></S>
<S>1. To determine the solubility of calcium hydroxide, a chemist took 25 mL of a saturated calcium hydroxide solution and found that it reacted completely with 8.13 mL of 0.102 mol/L hydrchloric acid. Calculate the molarity of the calcium hydroxide solution and the solubility of calcium hydroxide in g per litre.

2. A solution was made by dissolving 22.22 g of calcium chloride in enough water to make a 500 Ml solution. This was then reacted with 0.5 mol/L sulfuric acid to produce insoluble calcium sulfate. Calculate the volume of sulfuric acid needed to react and the mass of calcium sulfate produced.

3. What mass of insoluble lead bromide is formed when 30 mL of 0.050 mol/L potassium bromide is added to an excess of lead nitrate solution.</S>

4. 50 mL 0.20 mol/L sodium hydroxide was mixed with 50 mL 0.30 mol/L magnesium chloride. A precipitate of magnesium hydroxide was formed. Calculate the concentration of sodium ions, magnesium ions and chloride ions.

Attempted Solution:

1. Write the balanced equation.
2. Calculate the no. of moles of sodium hydroxide.
3. Calculate the no. of moles of magnesium chloride.
4. ???
......

Please, any help???