Physical Methods of Solution Concentration

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Questions and Answers

What is the unit of concentration that represents grams of solute per 100 grams of solution?

  • %V/V
  • %w/w (correct)
  • %w/V
  • ppm

What is the concentration unit that represents milliliters of solute per 100 milliliters of solution?

  • ppb
  • %V/V (correct)
  • %w/V
  • ppm

What is the concentration unit that represents grams of solute per 100 milliliters of solution?

  • %V/V
  • mg/mL
  • g/L
  • %w/V (correct)

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

<p>g/L (C)</p> Signup and view all the answers

What is the concentration unit that represents parts per billion?

<p>ppb (A)</p> Signup and view all the answers

A 5 g alloy contains 10 mg of copper. What is the concentration of copper in ppm?

<p>200 ppm (D)</p> Signup and view all the answers

What is the difference between physical and chemical methods of expressing concentration?

<p>Physical method uses gram and its derivatives while chemical method uses chemical units. (B)</p> Signup and view all the answers

How many milligrams of a substance are required to prepare 500 mL of a 2000 ppb solution?

<p>1 mg (B)</p> Signup and view all the answers

A 2% w/v solution of a substance means 2 grams of solute per 100 mL of solution.

<p>True (A)</p> Signup and view all the answers

The physical method of expressing concentration uses chemical units.

<p>False (B)</p> Signup and view all the answers

A solution with a concentration of 10 ppm has 10 milligrams of solute per liter of solution.

<p>True (A)</p> Signup and view all the answers

In a volume percent (%V/V) solution, the volume of solute is specified per 100 mL of solution.

<p>True (A)</p> Signup and view all the answers

A 5% w/w solution of a substance means 5 grams of solute per 100 grams of solution.

<p>True (A)</p> Signup and view all the answers

The concentration of a solution can be expressed in ppm, but not in ppb.

<p>False (B)</p> Signup and view all the answers

A solid-liquid solution is an example of a physical method of expressing concentration.

<p>False (B)</p> Signup and view all the answers

The physical method of expressing concentration is used to express the quantity of solute in chemical units.

<p>False (B)</p> Signup and view all the answers

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