Advanced Chemistry Notes

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Advanced Chemistry Notes

• Measuring Solutions

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Qualitative Measurement of Solutions

• Concentration of solutions can be referred to in
  general terms

Dilute few particles per unit
volume Concentrate many particle per unit
volume
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Quantitative Measurement of Solutions

• Percent by Mass
• mass mass solute / mass of solution X 100
• Vinegar is approximately 5 acetic acid by mass
• 5 acetic ______5 g HC2H3O2__________
• 100 g (HC2H3O2 H2O)

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Quantitative Measurement of Solutions Molarity
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Quantitative Measurement of Solutions Molarity

• Molarity Moles solute / Liters Solution
• EX 0.3 mol of NaCl is found in a 525 mL
  solution. What is the Molarity?
• M _____0.3 mol NaCl_____
• 0.525 L (H2O NaCl)
• M 0.57 mol/L Solution

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Quantitative Measurement of Solutions

• Molality Moles solute / Kg Solution
• EX 3.0 mol of NaCl is dissolved in 4.0 Kg of
  water. What is the Molality?
• m _____3.0 mol NaCl_____
• 4 Kg H2O
• m 0.57 molal Solution

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Quantitative Measurement of Solutions

• Density mass / unit Volume

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Summary

• Be able to
• Describe solutions and qualitatively
  quantitatively.
• Calculate
• Percent by mass
• Molarity of Solutions
• Molality of Solutions
• Density of Solutions