3) You add 36 g of MgSO4 to pure water to a final volume of 200 mL. What concentration of solution did you make ? Express the results as percentage, % (w/v).
To determine the concentration of the solution, you need to calculate the weight by volume percentage (% w/v). This percentage represents the weight of the solute (in this case, MgSO4) dissolved in a given volume of solution (in this case, water).
Step 1: Calculate the weight of MgSO4 in grams.
Given that you added 36 g of MgSO4 to the water.
Step 2: Calculate the volume of the solution in liters.
The final volume is given as 200 mL. To convert it to liters, divide by 1000:
200 mL ÷ 1000 = 0.2 liters
Step 3: Calculate the weight by volume percentage (% w/v).
Using the formula:
% w/v = (weight of solute / volume of solution) x 100%
In this case, the weight of the solute (MgSO4) is 36 g, and the volume of the solution is 0.2 liters:
% w/v = (36 g / 0.2 L) x 100%
Calculating this equation will give you the concentration of the solution in terms of weight by volume percentage, expressed as a percentage (% w/v).