Acids And Alkalis

Question 1

Name 3 everyday acids

Answer 1

Cola, squash, lemon juice, vinegar, shampoo, dry milk

Question 2

In litmus paper, acid is what colour?

Answer 2

Red

Question 3

Test for Gases produced by combustion

Answer 3

I will guide you through the puzzle. The gases get sucked into the funnel (by, I’ll tell you laters) into a tube, and into a U-tube, sitting in a beaker of iced water with Anyhdrous Copper II sulpate. The ice will condense the water vapour and the water will turn the Anhydrous Copper II Sulpate hydrous. Going along, it then leads to a test tube of limewater. The carbon dioxide will make it go cloudy. At the end is the pump sucking the gases.

Question 4

In litmus paper, what colour is alkali?

Answer 4

Blue

Question 5

What makes limewater cloudy

Answer 5

CO2 (Carbon Dioxide)

Question 6

Test for air containing 20% oxygen

Answer 6

Light a candle, put it in a trough of water, and put a jam jar on it. The candle will soon go out and the water level will rise into the jam jar by 20%

Question 7

Carbon (C) + Oxygen (02)

Answer 7

Carbon Dioxide (CO2)

Question 8

Magnesium (2 atoms of Mg) + Oxygen (02)

Answer 8

Magnesium Oxide (2 atoms of MgO)

Question 9

Iron (4 atoms of Fe) + Oxygen (3 atoms of O2)

Answer 9

Iron Oxide (2 atoms of Fe2O3)

Question 10

Name 3 everyday alkalis

Answer 10

Citrus cleaner, bicarbonate soda, washing powder, bath salt, cream