Exploring Acids and Bases

What are three common properties of acids?

• They do not conduct electricity

• They are always solid at room temperature

• Three common properties of acids are: they taste sour, they conduct electricity, and they react with bases.

• They taste sweet

How do bases generally feel to the touch?

• slippery or soapy

• cold and metallic

• rough and gritty

• sticky and tacky

What does the pH scale measure?

• The color of a solution.

• The acidity or alkalinity of a solution.

• The temperature of a solution.

• The concentration of solutes in a solution.

What color does litmus paper turn in an acid?

• Red

• Yellow

• Green

• Blue

Name one common inorganic acid and its use.

• Nitric acid (HNO3) - used for cleaning windows.

• Hydrochloric acid (HCl) - used for pH regulation and metal cleaning.

• Sulfuric acid (H2SO4) - used for food preservation.

• Acetic acid (CH3COOH) - used for making plastics.

What is the pH range of neutral substances?

• 6

• 8

• 5

• 7

What is an example of a natural indicator?

• Methyl Orange

• Bromothymol Blue

• Phenolphthalein

• Litmus

How do you determine the strength of an acid?

• The strength of an acid is determined by its dissociation in water, measured by Ka and pH.

• The strength of an acid is measured by its viscosity.

• The strength of an acid is based on its temperature.

• The strength of an acid is determined by its color.

What color does phenolphthalein turn in a base?

• Blue

• Green

• Yellow

• Pink

What is the source of citric acid?

• Citrus fruits and fermentation processes.

• Meat and fish

• Vegetables and grains

• Dairy products