Acids and Alkalis + bases and Alkalis

Question 1

What do we write when writing the formula for an acid?

Answer 1

• (aq)
• Aqueous Solutiom.
  Dissolved in water

Question 2

In aqueos solutions what do acids produce?

Answer 2

• in aq solutions acids produce hydrogen ions (+),

Question 3

What is a base?

Answer 3

• Chemicals that can nuetralise acids producing salt and water.
• Usually metal oxides or metal hydroxide.

Question 4

What are alkalis?

Answer 4

• Bases which are soluable in water.

-

Question 5

In aqeuos solutions what does alkali’s produce?

Answer 5

• Hydroxide ions.

Question 6

What is the PH level?

Answer 6

• Tells us the acidity of alkalinity of a solution.

Question 7

Scales of the PH levels:

Answer 7

Acids: 0-6
Ph 7= Neutral.
Alkaline= 8-14

Question 8

How can we determine the PH of a solution?

Answer 8

• Using a PH probe- determines ph electronically.
• Universal indicator- Changes colour depending if an solution is an acid, alkaline or neutral.
  Red= Acidid.
  Purple= Alkaline
  Green= Neutral.

Question 9

What is the neutralisation reaction between an acid and an alkaline?

Answer 9

• when we react an acid and alkaline:
• ## Hydrogen ions react with hydroxide ions to produce water.

Question 10

Nuetralisation reaction:

Answer 10

• H+ + OH- –> H20