Using concentration of solutions 2

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How do you work out concentration is mol / dm³

Number of moles / volume (dm³)

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Rearrange the equation of concentration to work out number of moles

concentration ( mol/dm³) x volume (dm³)

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<p>0.05 dm³ of sodium chloride solution with a concentration of 0.2 mol / dm³ reacts with 0.04 dm³ of silver nitrate solution, Calculate concentration of silver nitrate solution.</p>

0.05 dm³ of sodium chloride solution with a concentration of 0.2 mol / dm³ reacts with 0.04 dm³ of silver nitrate solution, Calculate concentration of silver nitrate solution.

Concentration of sodium chloride is 0.2 mol / dm³

Volume of sodium chloride is 0.05 dm³

Volume of silver nitrate is 0.04 dm³

Work out number of moles for sodium chloride ; 0.2 × 0.05 = 0.01 moles.

We know that 1 mole of sodium chloride reacts with 1 mole of silver nitrate, therefore we must also have 0.01 moles of silver nitrate.

Calculate concentration of silver nitrate; 0.01 / 0.04 = 0.25 mol / dm³

<p>Concentration of sodium chloride is 0.2 mol / dm³</p><p>Volume of sodium chloride is 0.05 dm³</p><p>Volume of silver nitrate is 0.04 dm³</p><p>Work out number of moles for sodium chloride ; 0.2 × 0.05 = 0.01 moles.</p><p>We know that 1 mole of sodium chloride reacts with 1 mole of silver nitrate, therefore we must also have 0.01 moles of silver nitrate.</p><p>Calculate concentration of silver nitrate; 0.01 / 0.04 = 0.25 mol / dm³</p>

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