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# Calculate the number of grams of citric acid

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1. Calculate the number of grams of citric acid, C6H8O7, needed to make 2500mL of 0.4 M C6H8O7.

2. How many grams of sodium hydroxide, NaOH, would you have to dissolve in 250 mL of water to make a 0.5 M solution of NaOH?

3. How many liters of water are required to make a 0.2M solution sulfide, Na2S, using 200g of Na2S?

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#### Solution Preview

1. In this question, you need to be able to apply the formula:
Molarity=Mole/Volume.
where molarity is in M
Mole is in mol
Volume is in L

First, the molecular weight of C6H8O7=6*12+8+16*7=192(g/mol)
Then, ...

#### Solution Summary

The solution provides detailed calculations and explanations for the problem.

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