9 Strong and weak acids and Bases

Which of the following is the correct definition of an acid according to the Arrhenius theory?

• A substance that increases the concentration of hydroxide ions in water.

• A substance that increases the concentration of hydrogen ions in water.

• A substance that donates electron pairs.

• A substance that accepts protons.

Which of the following statements best describes a weak base?

• It dissociates completely in water

• It does not dissociate at all in water

• It partially dissociates in water

• It is insoluble in water

What is the typical pH range of a strong acid in an aqueous solution?

• 1–3

• 4–6

• 7–9

• 10–12

Which of the following is a characteristic of strong acids?

• They have a high pH.

• They dissociate completely in water.

• They are always organic compounds.

• They are weak electrolytes.

Which of the following chemical equations represents the complete dissociation of a strong acid in water?

Which of the following substances is a weak acid?

Tags

NGSS.HS-PS1-3

• It is insoluble in water.

• It completely ionizes in water.

• It only partially ionizes in water.

• It has a high pH.

Which of the following bases is considered strong?

Which of the following statements is true about the pH of a weak acid solution compared to a strong acid solution of the same concentration?

• The weak acid solution has a lower pH.

• The weak acid solution has a higher pH.

• Both have the same pH.

• The pH cannot be compared.