acids and alkalis

Question 1

explain acids

Answer 1

acids are liquids that are acidic. they turn litmus red and have a PH of under 7.
they are often corrosive. this means they destroy living tissue.

Question 2

what is the percentage of sulfuric acid produced in every continent?

Answer 2

worldwide, 180 million tonnes of sulfuric acid are produced.

(highest to lowest)

Asia~35%
North America~24%
Africa~11%
Western Europe~10%
Eastern Europe~10%
South and central America~7%
Oceana~3%

Question 3

Describe Alkalis

Answer 3

Alkalis are the opposite of acids. they have a PH of 7-14. they turn litmus blue. They often feel soapy. they are NOT corrosive.

Question 4

what is litmus indicator?

Answer 4

Litmus indicator shows whether a solution is acidic or alkaline.you can use it as a solution, or as a paper

Question 5

What is universal indicator?

Answer 5

You can use universal indicator to find the pH of a solution.When you add it to a solution it changes to one of the colours on the pH scale. The colour shows the pH of the solution.

Question 6

How does making hibiscus indicator at home and in a lab differ?

Answer 6

At home
1-add hibiscus flower to warm water in a cooking pot
2-Pour the mixture through a colander
3-Collect the solution in a glass
Ready

In a laboratory
1-add hibiscus flower in a beaker
2-Hear the solution over a Bunsen burner
3-Pour the mixture through filter paper
4-collect the mixture in a conical flask

Question 7

Explain concentrated and dilute acids

Answer 7

When an acid is mixed with a lot of water, It is dilute.

When an acid is not mixed with any water, it is concentrated

Concentrated acids are very corrosive.

Question 8

What is neutralisation?

Answer 8

If you add an alkaline solution to an acidic solution you will neutralise it.