1.How many moles of H 2 SO 4 are there in 200 mL of 0.1 M H 2 SO 4 ? 2.How many

Question

1.How many moles of H2SO4 are there in 200 mL of 0.1 M H2SO4?

2.How many grams of H2SO4 are dissolved in 200 mL of 5.0 M H2SO4? (The molar mass of H2SO4 is 98 g.)

3. 4.9 g of H2SO4 is dissolved in 0.5 L water. What is the molarity of the solution? (The molar mass of H2SO4 is 98 g.)

4.

A 300 mL of 0.3 M HCl solution is mixed with a 300 mL of 0.5 M HCl solution. What is the molarity of the final solution?

5.How many liters of a 0.1 M HCl solution react completely with 0.4 L of a 0.2 M NaOH solution?

A 300 mL of 0.3 M HCl solution is mixed with a 300 mL of 0.5 M HCl solution. What is the molarity of the final solution?

Explanation / Answer

1. Moles=200×0.1/1000=0.02

2. mass=200×5×98/1000=98g

3. Molarity=moles/volume=(4.9/98)÷0.5=0.1M

4. Molarity=(300×0.3+300×0.5)÷600=0.4M

5. Volume=(0.4×0.2)÷0.1=0.8L

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