Scientific Principles: Solutions, Emulsions & Colloids Flashcard

Front

Which of the following is NOT true about mixtures? A. Mixtures are a combination of two or more substances which are not chemically united B. Mixtures are a combination of two or more substances which exist in a fixed proportion to each other C. Mixtures are a combination which can be physically separated into pure compounds D. Mixtures are a combination which can have changing physical properties

Back

Mixtures are a combination of two or more substances which exist in a fixed proportion to each other.

Front

A mixture which has an even concentration throughout is known as a __________.

Back

Solution

Front

A solution is made by dissolving 125 g of sodium chloride in 1.5 kg of water. What is the percent by mass?

Back

7.69

Front

If you have salt, water and a plastic cup, which of the following correctly labels the role of each in making a solution?

Back

Salt=Solute, Water=Solvent, Plastic cup=System

Front

Which of the following solutions has the highest concentration? Two grams of salt in two liters of water, Two grams of salt in three liters of water, Three grams of salt in two liters of water, Three grams of salt in one liter of water

Back

Three grams of salt in one liter of water

Front

Label the following as either Brownian movement or the Tyndall effect. (Image of particles in random motion and light scattering through a colloid)

Back

Tyndall effect

Front

What type of colloid is a pearl?

Back

Solid material dispersed in solid

Front

A mixture of two or more immiscible liquids is called a/an __________.

Back

Emulsion

Front

Which type of colloid remains in a thickened state for an extended period of time?

Back

Permanent

Front

Fill in the blank: A vinaigrette is an example of a _______ emulsion.

Back

Temporary