Chemistry Bases and Alkalis Form 2

What does PH scale show?

• It shows how alkalinc or sour a solution is.

• The neutralisation of acids and solutions.

• any substance that has hydrogen ions.

• It measures how acidic or basic a solution is.

A piece of blue Litimus paper is inserted into hydrochloric acid. What color will it turn?

• light purple

• red

• none of the above

• orange-yellowish

What acids do we use in neutralisation rections equations?

• Nitrate acid

  Calcium oxide

  Sulfuric acid

• Acetic acid (CH3COOH)

• Hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3)
• Phosphoric acid (H3PO4)

What reactants would form these products: calcium sulfate + water

• sodium nitrate + calcium acid

• sulfuric acid + calcium oxide

• water + carbon dioxide + sulfuric acid

• sulfuric base + calcium nitrate

nitric acid + sodium carbonate --->

(a)  

How to remove indicator color

• By adding Activated Charcoal powder.

• By adding sodium chloride.

• None of the above, it cant be removed.

• By adding heat.

Sodium hydroxide is a....

• concentrated base

• dilute acid

• dilute alkali

• strong alkali

What number in the PH scale will these substances be: Bleach,

• 1,6

• 7

• 11,13

• 8,9

What color does red litmus paper turn when placed in a basic solution?

• blue

• purple

• green

• yellow

Which of the following is a strong acid?

• Acetic acid (CH3COOH)

• Citric acid (C6H8O7)

• Hydrochloric acid (HCl)

• Carbonic acid (H2CO3)