Acids & Alkalis

What are the properties of acids?

• Acids have a pH greater than 7

• Acids accept protons

• Acids turn red litmus paper blue

• Acids donate protons, have a pH less than 7, turn blue litmus paper red, and react with metals to produce hydrogen gas.

List the properties of alkalis.

• Sour taste, turn blue litmus paper red, non-corrosive

• Bitter taste, slippery feel, turn red litmus paper blue, corrosive

• Sweet taste, turn red litmus paper blue, non-corrosive

• Neutral pH, turn red litmus paper blue, non-corrosive

Name a common indicator for acids.

• Universal indicator

• Red cabbage indicator

• Litmus paper

• PH paper

What indicator is used for alkalis?

• Litmus paper

• Phenolphthalein

• Universal indicator

• Bromothymol blue

What happens during a neutralization reaction?

• A neutral substance is formed by mixing an acid and a base.

• An acid reacts with a base to form water and sugar.

• An acid reacts with a base to form water and a salt.

• A base reacts with an acid to form water and a salt.

Provide an example of a neutralization reaction.

• H2SO4 + 2NaOH -> Na2SO4 + 2H2O

• H2O + NaCl -> HCl + NaOH

• 2HCl + Na2CO3 -> 2NaCl + H2O + CO2

• HCl + NaOH -> H2O + NaCl

What are some common uses of acids?

• Cleaning, pH regulation, food preservation, chemical synthesis

• Watering plants, Fuel for vehicles, Building materials

Name a practical application of alkalis.

• Cleaning products

• Baking bread

• Fuel for cars

• Building materials

How do acids taste?

• Sweet

• Bitter

• Sour

• Salty

What color do alkalis turn litmus paper?

• Red

• Yellow

• Green

• Blue