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Chapter 10 Acids and Bases

Chapter 10 Acids and Bases. 10.10 Dilutions. Dilution. Diluting a solution Is the addition of water. Decreases concentration. Concentrated Diluted Solution Solution. Diluting a Solution. In a dilution, the amount (moles or grams) of solute does not change.

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Chapter 10 Acids and Bases

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  1. Chapter 10 Acids and Bases 10.10 Dilutions

  2. Dilution Diluting a solution • Is the addition of water. • Decreases concentration. Concentrated Diluted Solution Solution

  3. Diluting a Solution • In a dilution, the amount (moles or grams) of solute does not change. Amount solute (initial) =Amount solute (dilute) • A dilution increases the volume of the solution. Amount soluteAmount solute Volume (initial) Volume (increased) • As a result, the concentration of the solution decreases.

  4. Dilution Equation • The dilution calculation can be expressed as an equation. C1V1 = C2V2 C = concentration • For molar concentration, the equation is M1V1 = M2V2 (moles) = (moles after dilution ) • For percent concentration, %1V1 = %2V2 (grams) = (grams after dilution )

  5. Calculation How many milliliters of 6.0 M NaOH solution are needed to prepare 1.0 L of a 0.15 M NaOH solution? M1 = 6.0 M M2 = 0.15 M V1 = ??? V2 = 1.0 L Rearrange the dilution equation for V1 V1 = M2V2= 0.15 M x 1.0 L M1 6.0 M = 0.025 L x 1000 mL = 25 mL 1 L

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