Solutions and Electrolytes

Which of the following is an electrolyte?

• sodium chloride

• sugar (carbon, oxygen, hydrogen)

• water (hydrogen and water)

• sand (silicon and oxygen)

A solution is defined as

• A mixture of oil and water

• A mixture where a substance is dissolved

• A mixture that contains two solids

• None of the above

Select ALL the correct statement from the options below

• The hotter the water, the slower the salt will dissolve

• The hotter the water, the faster the salt will dissolve

• The smaller the size of the salt particles, the faster they will dissolve

• The larger the salt particles, the faster they will dissolve

Tags

NGSS.MS-PS1-4

A homogeneous mixture that is uniformly mixed is

• A mixture of oil and water

• A solution

• A mixture of ice and water

• None of the above

A solvent is

• a mixture

• a liquid

• A substance which dissolves a solute

• anything that can mix

The substance being dissolved.

• Solute

• Solvent

• Solution

• Concentration

The ​ (a)   formed through​ (b)   allow an electric current to flow through a solution.

• ions

• electrolytic dissociation

• dissolution

• evaporation

• molecules

• elements

• sublimation

Tags

NGSS.MS-PS1-2

The higher the pH of a solution, the more​ (a)   the solution and the lower the pH the more​ (b)   the solution.

• basic

• acidic

Draw an electrical conductivity probe in a solution with NaCl. Draw arrows to indicate the movement of the ions.

Tags

NGSS.MS-PS1-2

Mg(OH)2 (s). --> Mg2+ (aq) + OH- (aq) in water. Therefore, Mg(OH)2 is a(n) _________.

• Acid

• Base

• Salt