Colloids and Suspensions
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Questions and Answers

What is the primary difference between a suspension and a colloid?

  • The chemical composition of the particles
  • The method of filtration
  • The settling rate of the particles
  • The size of the particles (correct)

    • What is the characteristic of strong electrolytes in solution?

  • They conduct an electric current well. (correct)
  • They produce few ions in solution.
  • They are insoluble in water.
  • They do not conduct an electric current.

    • Which of the following is an example of a strong electrolyte?

  • H2O2
  • NaCl (correct)
  • Oxygen
  • Sugar

    • What is the unit of solubility?

    <p>Grams of solute per 100 mL of solution</p> Signup and view all the answers

    What is the primary characteristic of a nonelectrolyte?

    <p>It does not conduct electricity</p> Signup and view all the answers

    What is the key principle of solubility?

    <p>Like dissolves like.</p> Signup and view all the answers

    What is the primary difference between a solution and a colloid?

    <p>The particle size</p> Signup and view all the answers

    What happens to the components of a suspension?

    <p>They settle to the bottom</p> Signup and view all the answers

    What type of compounds are usually soluble in water?

    <p>Ionic and polar covalent compounds</p> Signup and view all the answers

    What is an example of a weak electrolyte?

    <p>H2CO3</p> Signup and view all the answers

    What is the term for the maximum amount of solute that can dissolve in a given amount of solvent?

    <p>Saturated solution</p> Signup and view all the answers

    What type of compounds do not conduct an electric current?

    <p>Nonelectrolytes</p> Signup and view all the answers

    What is the molar mass of NaOH used in the calculation of molarity?

    <p>40.0 g/mol</p> Signup and view all the answers

    What is the conversion factor used to convert milliliters of solution to liters of solution?

    <p>1000 mL/L</p> Signup and view all the answers

    What is the unit of molarity?

    <p>mol/L</p> Signup and view all the answers

    What is the formula to calculate molarity?

    <p>M = moles of solute / liter of solution</p> Signup and view all the answers

    How many liters of solution are in 250 mL of solution?

    <p>0.25 L</p> Signup and view all the answers

    What is the molarity of the sodium hydroxide solution?

    <p>2.0 M</p> Signup and view all the answers

    What is the concentration of a solution that contains 30 mL of 2-propanol in 120 mL of solution?

    <p>25%</p> Signup and view all the answers

    What is the unit of concentration that represents the number of moles of solute per liter of solution?

    <p>Molarity</p> Signup and view all the answers

    If a solution contains 0.5 g of solute in 100 g of solution, what is the concentration of the solution in ppm?

    <p>5000 ppm</p> Signup and view all the answers

    What is the concentration of a solution that contains 20 mL of solute in 100 mL of solution, if the density of the solution is 1.0 g/mL?

    <p>20%</p> Signup and view all the answers

    If a solution contains 2.5 g of NaCl in 250 mL of solution, what is the molarity of the solution?

    <p>0.1 M</p> Signup and view all the answers

    What is the maximum level of lead allowed in drinking water in units of ppm?

    <p>1.5 × 10^–2 ppm</p> Signup and view all the answers

    What is the concentration of a solution formed by diluting 5.0 mL of a 3.2 M glucose solution to 40.0 mL?

    <p>0.40 M</p> Signup and view all the answers

    If 45 g NaCl is added to 150 grams of water, what is the resulting solution?

    <p>Unsaturated</p> Signup and view all the answers

    What is the molarity of a solution containing 117 g of potassium hydroxide (KOH) dissolved in 2.00 L of water?

    <p>2.08 M</p> Signup and view all the answers

    Which of the following is a step in solving a dilution problem?

    <p>Write the equation and isolate M2 on one side.</p> Signup and view all the answers

    What is the unit of measurement that cancels out when solving a dilution problem?

    <p>Milliliters</p> Signup and view all the answers

    What is the ratio of NaCl to water in the solution described in the activity?

    <p>30 g NaCl/100 g H2O</p> Signup and view all the answers

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