What is the concentration of this solution? If you added 10mL of water to the 10mL of 0.010M CaCl2 solution.
To determine the concentration of the resulting solution after mixing water and the CaCl2 solution, we need to consider the new volume and the amount of dissolved CaCl2.
First, let's calculate the new volume:
Original volume of the CaCl2 solution = 10 mL
Volume of water added = 10 mL
New volume = Original volume + Volume of water added = 10 mL + 10 mL = 20 mL
Next, let's determine the amount of CaCl2 present in the 10 mL of 0.010M CaCl2 solution:
Concentration of CaCl2 = 0.010 M
Volume of CaCl2 solution = 10 mL
Amount of CaCl2 = Concentration × Volume = 0.010 M × 10 mL = 0.1 mmol
Since water does not contain any solute, the amount of CaCl2 remains the same after mixing. Therefore, the new solution still contains 0.1 mmol of CaCl2.
Finally, we can calculate the concentration of the new solution:
Concentration of the new solution = Amount of solute ÷ Volume of solution
Amount of CaCl2 = 0.1 mmol
Volume of solution = 20 mL
Concentration of the new solution = 0.1 mmol ÷ 20 mL = 0.005 M
Therefore, the concentration of the resulting solution after adding 10 mL of water to the 10 mL of 0.010 M CaCl2 solution is 0.005 M.