Acid and Alkali

Barium hydroxide is an alkali. It reacts with hydrochloric acid. How does the pH of the hydrochloric acid change as an excess of aqueous barium hydroxide is added?

• The pH decreases from 14 and becomes constant at 7.

• The pH decreases from 14 to about 1.

• The pH increases from 1 and becomes constant at 7.

• The pH increases from 1 to about 14.

Which option below places the pH values in the correct order, from WEAKEST ACID to STRONGEST ACID?

• 1,4,5,6

• 6,4,3,1

• 7,9,11,14

• 13,12,10,8

An organic substance that changes color in the presence of an acid or base

• indicator

• inhibitor

• catalyst

• universal solvent

Tags

NGSS.MS-PS1-2

Which of the following are properties of acids?

• Acids taste bitter.

• Acids taste sour.

• Acids feel slippery.

• Acids conduct electricity

• Acids turns litmus paper red.

Which of the following are properties of bases? (choose all that apply)

• taste bitter.

• taste sour.

• feel slippery

• react with metals

• have a pH of more than 7.

This image represents

• neutralization reaction

• synthesis

• decompostion

• single displacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Reacts with metals

• acid

• base

• both acid and base

Tags

NGSS.MS-PS1-2

What property do all three of these common household substances have in common?

• they are all basic
• they taste sour
• they have a pH below 7
• they all turn litmus paper red

Tags

NGSS.MS-PS1-2

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

Which of these turn red litmus paper blue?

• acids

• bases

• salts