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9.5 Dilution of Solutions

- Diluted solutions are often prepared in chemistry and biology.

- The concentration of the solution decreases.
- When you add three cans of water to a can of concentrated orange juice, you are making a dilution.

- There is no change in the number of particles when water is added.

- As the volume of the solution increases, the solute particles spread out.

- The concentration may be percent concentration or molarity.

- In Sample Problems 9.12 and 9.13 we can rearrange the dilu tion expression to solve the unknown quantity.

- The table should have concentrations and volumes of the solutions.

- The dilution expression is used to solve the unknown quantity.

- The dilution expression can be used to substitute the known quantities.

- The concentration of the solution decreases when the initial molarity is less than 1 and the volume factor is less than 1.

- The table should have concentrations and volumes of the solutions.
- To make sure the units of concentration and volume are the same, we organize the solution data in a table.

- The dilution expression is used to solve the unknown quantity.

- The dilution expression can be used to substitute the known quantities.

- As predicted in Step 1.

- The final volume is 6.0 L.

- Water is added to the 12 M NaOH solution to make 3.0 L of a diluted NaOH solution.

- A sample of a 25% (m/v) KOH solution is being washed with water so that the final volume is 100.0 mL.

- A sample of 15% (m/v) H a 20.0% H 2SO4 solution is added to water to give a final volume of 250 mL.

- Determine the initial volume, in liters, required to prepare the water so that the final volume is 200.0 liters.

- A 0.200 M HNO 2H3O2) 3 solution is added to water to give a final volume of 25 mL.

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