Chemistry Retest

Zn(OH)₂ is an example of a...

• acid

• base

• salt

• water

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic

• strongly basic

• slightly acidic

• slightly basic

Tags

NGSS.HS-LS1-3

H₃PO₄ is an example of a ...

• acid

• salt

• base

• non-electrolyte

An acidic solution would:

• taste bitter and turn litmus blue

• turn bromothymol blue yellow and feel slippery

• Be corrosive and release hydroxide ions

• taste sour and turn blue litmus red

Two properties of JUST acids are:

• Corrosive and donate hydroxide ions

• Taste sour and pH less than 7

• electrolytes and feel slippery

• dissolve fats and oils and turns blue litmus red

The table shows the pH of several solutions. Which solution is the most acidic?

• vinegar

• milk

• water

• bleach

Which of two properties of bases you can use to detect the presence of a base in the lab?

• taste bitter and release hydroxide ions

• pH greater than 7 and turns red litmus blue

• feels slippery and dissolves fats and oils

• turns bromothymol blue yellow and is corrosive

What is the correct formula for hydrophosphoric acid? 

• H₃PO₄

• H₃P

• H₃PO₃

• HPO₄

A characteristic of acids is:

• they are proton donors

• they have a pH greater than 7

• they turn red litmus blue

• all of the above

Calculate the pH of the solution with the following concentration   [H⁺]= 5.6  x 10^-8

• 7.25

• 8.25

• 11.2

• 8.74