12 Questions
What is the difference between physical and chemical methods of expressing concentration?
Physical methods use physical units such as weight, volume, and percentage to express the concentration of a solution, while chemical methods use chemical units such as moles, molecules, and equivalents to express the quantity of solute.
What is the weight per weight percentage (w/w) and how is it calculated?
Weight per weight percentage (w/w) is the grams of solute per 100 g of solution. It is calculated by dividing the weight of the solute by the weight of the solution and multiplying by 100.
What is the volume per volume percentage (V/V) and how is it calculated?
Volume per volume percentage (V/V) is the milliliters of solute per 100 mL of solution. It is calculated by dividing the volume of the solute by the volume of the solution and multiplying by 100.
What is the difference between ppm and ppb units of concentration?
Parts per million (ppm) is a unit of concentration that represents one part of a solute per one million parts of the solution, while parts per billion (ppb) is a unit of concentration that represents one part of a solute per one billion parts of the solution.
How would you calculate the concentration of a substance in a solution using the weight-to-volume percentage (w/v) method?
To calculate the concentration of a substance in a solution using the weight-to-volume percentage (w/v) method, you would divide the weight of the solute by the volume of the solution and multiply by 100.
How would you prepare a solution of a substance with a concentration of 2000 ppb?
To prepare a solution of a substance with a concentration of 2000 ppb, you would add 2 mg of the substance to 1000 mL of the solvent.
In a physical method, percentage is expressed as grams of solute per 100 mL of solution.
False
A solid-liquid solution is a type of physical method.
True
The weight-to-volume percentage is expressed as grams of solute per 100 grams of solution.
False
Chemical method expresses concentration in terms of chemical units.
True
Ppm and ppb are units used to express weight-to-volume percentage.
False
The physical method only expresses concentration in terms of weight percent.
False
This quiz covers physical methods of solutions, including liquid-liquid and solid-liquid solutions, and calculations of concentration in ppm and ppb units. It also includes questions on percentage calculations, such as weight percent and volume percent.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
