Question

If you mix three Dixie cups continents together containing .05 L of 1.0 M lemonade, .05 L of 2.5 M lemonade, and .05 L of .5M lemonade, what would be the molarity of the resulting solution?

Show work please

Answer 1

If mL of solution is mixed mL of another solution of same substance, the Molarity of resulting solution is

Given that

0.05 L of 1.0 M lemonade, 0.05 L of 2.5 M lemonade, and .05 L of 0.5 M lemonade solutions are mixed.

Concentration of resultant solution is

M = 1.333 M

Molarity of resultant solution is 1.33 M

This problem can also be solved in the following method.

Number of moles of Lemonade in 0.05 L of 1 M solution is

= 0.05 L * 1 M = 0.05 moles

Number of moles of Lemonade in 0.05 L of 2 M 2.5 solution is

= 0.05 L * 2.5 M = 0.125 moles

Number of moles of Lemonade in 0.05 L of 0 .5 M solution is

= 0.05 L * 0.5 M = 0.025 moles

Total number of moles of Lemonade in the resultant solution is

= 0.05 moles + 0.125 moles + 0.025 moles

= 0.2 moles

Total volume of the solution is

0.05 L + 0.05 L + 0.05 L = 0.15 L

M = Number of moles of solute/ Volume of solution in Litres

M = 0.2 moles /0.15 L

M = 1.33 moles /L

M = 1.33 M