Chemistry
posted by Abass .
How many milliliters (ml) of 5 M MgCl2 must be added to 25 ml of a 0.5 M MgCl2 solution
to produce 1500 ml with a final MgCl2 concentration = 1.75 M? How much water?

Let's see how much MgCl2 we need in the final solution:
1500 mL of 1.75 M solution contains
1.5 * 1.75 = 2.625 moles of solute
25 mL of 0.5M solution contains
.025 * 0.5 = .0125 moles of solute
So, we need to add 2.6125 moles of solute.
That means we need 2.6125/5 = .5225 L of 5M solution (522.5 mL)
So, now we have .025+.5225 = .5475L of solution. We want 1.5L, so we have to add
1.500.5475 = .9525L or 952.5 mL of water
Respond to this Question
Similar Questions

College Chemistry
If 69.3g of magnesium chloride were produced from a process with a known yield of 78.3%, find the mass of carbon tetrachloride in grams that was used. Equation: 2CCl4 + MgCrO4 > 2COCl2 + CrO2Cl2 + MgCl2 I was able to solve it but … 
chemistry
What is the molarity of the resultant MgCl2 solution formed by mixing 100 cm3 of 0.5 M MgCl2 solution and 150 cm3 of 0.9M MgCl2 solution? 
Chemistry
Consider 125 mL of 0.110 M MgCl2 solution. a. How many moles of MgCl2 are contained in 125 mL of 0.0110 M MgCl2? 
Chemistry
If Chelcy and Allyson reacted 2.55 grams of Mg with excess hydrochloric acid (HCl), how many grams of MgCl2 will they theoretically produce? 
Chemistry
40.0 g of magnesium chloride (MgCl2) in 250.0 g of water at 22 °C.Calculate a) the vapor pressure of this solution, b) the freezing point, c) the boiling point. I know it is something like this, but I continue to get the incorrect … 
Chemistry
In order to make 500.0mL of a 1.835 M MgCl2 solution, then _______g of MgCl2 is needed. Moles of MgCl2= (1.835M)(0.5L)=0.9175mol Molecular Weight of MgCl2= 95.211 g/mol (0.9175mol MgCl2)(95.211 g/mol)= 87.36g of MgCl2 Did I do this … 
Science
what is the concentration (M) of a MgCl2 solution prepared by dissolving 7.2 g of MgCl2 in sufficient water to give 362 mL of solution? 
Chemistry
A 1.0g sample of MgCl2 produced a 10.00C increase in a calorimeter charged with 40.0mL of deionized water. The specific heat is of MgCl2 is 0.750J/C*g. What is the value of delta(s)H for MgCl2? 
Chemistry
A 1.0g sample of MgCl2 produced a 10.00C increase in a calorimeter charged with 40.0mL of deionized water. The specific heat is of MgCl2 is 0.750J/C*g. What is the value of delta(s)H for MgCl2? 
Chemistry
What is the mass of MgCl2 required to make 500mL if 1.200 M of MgCl2 Solution?