# Calculating amount of H2SO4 needed for dilution

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1. Aug 27, 2016

### LegitSci

1. The problem statement, all variables and given/known data
How much 4.00M of HCl is required to make 100ml of 0.400M HCl?

2. Relevant equations
M1V1 = M2V2

3. The attempt at a solution
Its (4.00M)*(xL) = (0.400M)(0.100L)
I think its 0.005L but the possible answer (multiple choice) say otherwise...

2. Aug 27, 2016

### LegitSci

I just need confirmation if i did it right or i messed up on something

Thanks

3. Aug 27, 2016

### Ygggdrasil

This equation is setup correctly.

But the number you get is incorrect. Try re-doing the calculation.

4. Aug 27, 2016

### epenguin

They ask you how much of a solution is required to make (100 ml of) a solution a tenth as concentrated and you need a formula?

5. Aug 27, 2016

### LegitSci

The question should say How much 4.00M of HCl is required to make 100ml of 0.200M HCl?

Oops typo, I meant to say (4.00M)*(xL) = (0.200M)*(0.100L)

6. Aug 27, 2016

### LegitSci

but the multiple options are 0.000125L, 1250ml, 125 ml, 50,000ml

7. Aug 27, 2016

### LegitSci

naturally, i'd want to pick the smallest value which is 0.000125L, but its not what i got

8. Aug 28, 2016

### Staff: Mentor

Must be a mistake in the test (assuming you finally listed the problem and answers right).

9. Aug 28, 2016

### Bystander

... or, 4.00 M H2SO4?

10. Aug 28, 2016

### Staff: Mentor

So the thread Subject is wrong?