Concentration Calculations

What volume of 0.01 mol/dm³ HCl solution will neutralise 50cm³ of 0.01 mol/dm³ NaOH solution?

• 0.25cm³

• 25cm³

• 50cm³

• 100cm³

Tags

moles = conc x vol

vol = moles / conc

H₂SO₄ + 2NaOH --> Na₂SO₄ + 2H₂O

To 2 dp, what volume of 2.0 mol/dm³ H₂SO₄ solution will neutralise

36.20cm³ of 2.0 mol/dm³ NaOH solution?

• 36.20cm³

• 18.10cm³

• 0.04cm³

• 0.02cm³

Answer explanation

Each mole of H₂SO₄ neutralises 2 moles of NaOH

Tags

moles = conc x vol

vol = moles / conc

reacting ratio

What is the concentration of the NaOH solution, if 20.0cm³ of it is neutralised by 25.00cm³ of 0.1 mol/dm³ H₂SO₄ solution?

• 0.75 mol/dm³

• 1.0 mol/dm³

• 1.25 mol/dm³

• 0.25 mol/dm³

Answer explanation

Each mole of H₂SO₄ reacts with 2 moles of NaOH

Tags

conc = moles / vol

reacting ratio

moles = conc x vol

acids as monoprotic/diprotic/triprotic

What is the concentration of the H₂SO₄ solution, if 40.0cm³ of it is neutralised by 20.00cm³ of 0.1 mol/dm³ NaOH solution?

• 0.025 mol/dm³

• 4.00 x 10^-5 mol/dm³

• 0.03 mol/dm³

• 25.00 mol/dm³

Tags

conc = moles / vol

reacting ratio

moles = conc x vol

acids as monoprotic/diprotic/triprotic

What is the concentration of the NaOH solution, if 36.00cm³ of it neutralises 25.0cm³ of 2.4mol/dm³ H₃PO₄ solution?

• 2.16 x 10^-3 mol/dm³

• 4.5 x 10^-3 mol/dm³

• 5.0 mol/dm³

• 7.2 x 10^-4 mol/dm³

Answer explanation

Each mole of H₃PO₄ neutralises 3 moles of NaOH

Tags

conc = moles / vol

reacting ratio

moles = conc x vol

acids as monoprotic/diprotic/triprotic

If it takes 50 mL of 0.5 M Ca(OH)₂ to neutralize 125 mL of sulfuric acid, what is the concentration of the acid?

• 0.2 M

• 5 M

• 0.5 M

What is the molarity of a NaOH solution if 11.6 mL of 3 M HCl was used to neutralize 25 mL of NaOH?

• 392 M

• 0.155 M

• 0.718 M

Tags

NGSS.HS-PS1-7

Calculate the volume of a 0.15 M Ba(OH)2 solution required to completely neutralize 45 cm³ of a 0.29 M HNO3 solution.

• 43.5 cm³

• 87 cm³

• 23.3 cm³

• 51.9 cm³

I have 50cm³ of 0.1M HCl. How many moles of NaOH will I need to neutralise it?

• 5

• 0.5

• 0.05

• 0.005

2.3 g of calcium chloride was dissolved in 50 cm³ of water. What is the concentration of the calcium chloride solution in g/dm³?

• 46 g/dm³

• 23 g/dm³

• 2.3 g/dm³

• 4.6 g/dm³