Unit 8 Review

What is the pH of a 1 x 10^-8 M solution of HNO₃?

• 8
• 6
• 7
• 7.5

If the solution of Al(OH)₃ has a pH of 11.5 and a pOH of 2.5. Is it an acid, base, or neutral?

• acid
• base
• neutral

The lower the pH, the greater the concentration of :

• OH^-

• H⁺

Examine the results (color change) of the pH paper shown in the picture.  What type of substance was tested?

• an acid
• a base
• a neutral substance
• none of the above

Tags

NGSS.MS-PS1-2

Where on the pH scale would you find a strong acid?

• 0-3
• 4-6
• 8-10
• 11-14

What ions does water dissociate into?

• OH- and OH-
• H+ and H+
• H+ and OH-
• HOH

What is the pH of a neutral substance?

• 3
• 7
• 10
• 14

What are the products of acid and base reactions?

• Salt and Hydrogen
• Salt, Water and Carbon dioxide
• Salt and Water
• Water and Carbon dioxide

Write dissociation equations for the following electrolytes. Show physical states of all species involved!
NaCl

• NaCl  --> Na⁺ + Cl^-
• NaCl_(s)  --> Na⁺_(aq) + Cl^-_(aq)
• NaCl  --> Na + Cl
  
• NaCl_(s) --> Na_(aq) + Cl_(aq)

Tags

NGSS.HS-PS1-7

What is the substance which can able to produce hydroxide ion when it dissolve in water?

• Organic
• Salt
• Acid
• Base