Acid and Base G9

Human blood has a pH of between 7.38 and 7.42. This means that the blood is ________.

• very acidic

• slightly acidic

• very basic

• slightly basic

An increase in the amount of hydroxide ions in a solution ____ the pH.

• raises

• lowers

• does not effect

• doubles

Consider the following reaction:

HCl + KOH --> H2O + KCl

Identify the base in the reaction above.

• HCl

• H2O

• KOH

• KCl

Consider the following reaction:

HCl + KOH --> H2O + KCl

Identify the acid in the reaction above.

• HCl

• H2O

• KOH

• KCl

Soap is a weak base.  What is true about the taste of bases?

• they taste sour
• they taste sweet
• they taste bitter
• they taste salty

Which of these solutions is an acid?

• Dish Soap: pH of 12
• Tomato Soup: pH of 4
• Baking Soda: pH of 9
• Drain Cleaner: pH of 14

Tags

NGSS.MS-PS1-2

What can neutralise a strong base

• Neutral

• Weak base

• Base

• Hydrochloric acid (pH of 3.01)

A student detected the pH of four unknown solutions A, B, C and D as follows: 11, 5, 7 and 2. Predict the nature of these solutions. Which one is neutral solution

• A

• B

• C

• D

Acids react with

• water to produce bases and salts
• salts to produce bases and water
• neither bases, salts nor water
• bases to produce salts and water

A substance is found to have the following characteristics:

Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water

In what category would the substance be classified?

• acid

• base

• enzyme

• fatty acid

Tags

NGSS.MS-PS1-2