prepare 25.00mL of a standard solution of vitamin C at a concentration of 2.00 mg/mL. What weight of vitamin C is required
How many mg do you need? That is 2.00 mg/mL x 25.00 mL = ? mg.
So weigh out ?mg vit C.
50 mg
To determine the weight of vitamin C required, we need to use the formula:
Weight of vitamin C (g) = concentration of vitamin C (mg/mL) x volume of solution (mL)
Given:
Concentration of vitamin C = 2.00 mg/mL
Volume of solution = 25.00 mL
Substituting the values into the formula, we can calculate the weight of vitamin C required:
Weight of vitamin C (g) = 2.00 mg/mL x 25.00 mL
First, let's convert the concentration from mg/mL to g/mL by dividing it by 1000:
Concentration of vitamin C (g/mL) = 2.00 mg/mL ÷ 1000 = 0.002 g/mL
Now, we can calculate the weight of vitamin C:
Weight of vitamin C (g) = 0.002 g/mL x 25.00 mL
Multiplying the values:
Weight of vitamin C (g) = 0.002 g/mL x 25.00 mL = 0.05 g
Therefore, you would need 0.05 grams of vitamin C to prepare a 25.00 mL standard solution with a concentration of 2.00 mg/mL.