Question

# Dye stock solutions are 400X and 40X stock. How much of each is needed to make...

Dye stock solutions are 400X and 40X stock. How much of each is needed to make a 2X solution in 5mls?

#### Homework Answers

Answer #1

For this, we will sue formula

C1V1 =C2V2

For 400x

C1 = Concentration of stock = 400

V1 = Volume of stock = X

C2 = Concentration of solution = 2

V2= Volume of solution = 5

Now

C1V1 = C2V2

400*X = 2*5

x= 10/400 = 0.025 mL

So 0.025 mL of 400X is needed to make 5mL of 2x.

For 40x

C1 = Concentration of stock = 40

V1 = Volume of stock = X

C2 = Concentration of solution = 2

V2= Volume of solution = 5

Now

C1V1 = C2V2

40*X = 2*5

x= 10/40 = 0.25 mL

So 0.25 mL of 40X is needed to make 5mL of 2x.

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