Concentration calculations

How do you calculate the molar concentration of a solution?

Molarity = moles of solute / volume of solution in litres

What units are used for concentration?

Concentration is measured in mol/dm³.

How would you calculate the final concentration of a diluted solution?

Use the equation: C1V1=C2V2, where C is concentration and V is volume.

What is the concentration of a solution with 2 moles of NaCl in 4 dm³ of water?

Concentration = 2 mol ÷ 4 dm³ = 0.5 mol/dm³.

How do you convert between molarity and molarity in moles per liter?

1 mol/dm³ is equivalent to 1 mol/L, so they are interchangeable.

How do you calculate the number of moles from concentration and volume?

Use the equation moles=concentration×volume

If you dilute a solution by a factor of 2, how does the concentration change?

The concentration will be halved.

How do you find the volume of a solute in a given concentration and volume?

V₂ = C₁V₁ / C₂

What is the relationship between volume and concentration in a dilution?

Volume and concentration are inversely proportional in a dilution process.

What is the effect of increasing the volume of solvent in a solution?

The concentration of the solution will decrease.

How do you find the concentration of a solution if the moles and volume are known?

Concentration = moles / volume

How would you prepare 1 dm³ of a 1 mol/dm³ NaCl solution from solid NaCl?

Dissolve 58.5 grams of NaCl in water to make 1 dm³ solution.

How can concentration affect reaction rates?

Higher concentrations usually lead to faster reaction rates due to more collisions.

How does the volume of a solution affect its molar concentration?

Decreasing the volume increases the concentration, and increasing the volume decreases it.

How is concentration related to the amount of solute in a solution?

Higher concentration means more solute is dissolved in a given volume of solvent.