pH Indicators and Antacids

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

A base is a substance

• That releases OH- ions when dissolved in water

• That releases H+ ions when dissolved in water

• Does not release any ions when dissolved in water

• None of the above

Tags

NGSS.MS-PS1-2

On the pH scale lower numbers indicate

• acids

• bases

If you have a substance with a pH of 7.1 it is a(n).....

• strong Acid

• weak base

• strong base

• weak acid

How do antacids work?

• Make your stomach feel burnt

• Give your stomach more pain

• By reducing the level of acidity in the stomach

Bases will turn litmus paper __________, while acids will turn litmus paper __________.

• blue.....red
• red.....blue
• pink.........colourless
• colourless..........pink

Tags

NGSS.MS-PS1-2

An indicator will ______________ when it is in contact with an acid or base

• Bubble
• Form a new substance
• Change color
• Stay the same color

Tags

NGSS.MS-PS1-2

What is a substance that is one color in an acid and another color in a base? 

• Oxidizer
• Indicator

The pH of a strong acid would be:

• 1-2
• 5-6
• 8-9
• 12-13