Acids and Alkalis

What is a strong acid?

• Strong acids completely dissociate in water and have a low pH

• Strong acids do not react with water.

• Strong acids have a high pH.

• Strong acids are weak electrolytes.

What is a weak acid?

• Weak acids have a low concentration of hydrogen ions and do not completely dissociate in water.

• Weak acids have a low concentration of hydroxide ions and completely ionize in water.

• Weak acids have a high concentration of hydroxide ions and do not completely ionize in water.

• Weak acids have a high concentration of hydrogen ions and completely ionize in water.

Which of the following is a difference between a weak and strong acid?

• Strong acids have a higher concentration than weak acids.

• Strong acids are less corrosive than weak acids.

• Strong acids have a lower pH than weak acids

• Strong acids have a higher pH than weak acids.

Which type of acid has a higher concentration of hydrogen ions: strong or weak?

• strong

• neutral

• acidic

• weak

Which type of acid completely dissociates in water: strong or weak?

• strong

• neutralizes

• partially dissociates

• weak

Which type of acid has a higher pH value: strong or weak?

• strong

• basic

• weak

• neutral

Which are strong acids?

• Ethanoic acid (CH₃COOH)

• Nitric acid (HNO₃)

• Sulfuric acid (H₂SO4)

• Hydrochloric acid (HCl)

Give an example of a weak acid.

• ethanoic acid

• nitric acid

• sulfuric acid

• hydrochloric acid

What are the properties of alkalis?

• Alkalis have properties such as solubility in water, bitter taste, slippery feel, ability to conduct electricity, and ability to turn litmus paper blue.

• Alkalis have properties such as high solubility in water, salty taste, smooth feel, inability to conduct electricity, and ability to turn litmus paper green.

• Alkalis have properties such as insolubility in water, sweet taste, rough feel, inability to conduct electricity, and ability to turn litmus paper red.

• Alkalis have properties such as low solubility in water, sour taste, sticky feel, inability to conduct electricity, and ability to turn litmus paper yellow.

What is the difference between an acid and an alkali?

• Acids have a pH greater than 7, while alkalis have a pH less than 7.

• Acids turn blue litmus paper red, while alkalis turn red litmus paper blue.

• Acids are bitter in taste, while alkalis are sour in taste.

• Acids have a pH less than 7, while alkalis have a pH greater than 7.