Grade 8/ Year 9

1. Reaction of metals with acid

2. Before watching the
reactions do you know
what do we mean by acid ?
Let’s zoooom in !!!

3.  An acid is a substance that produces hydrogen gas in water.
 Some acids are found in everyday items such as food and drink,
and skincare products.
 It is safe to handle these acids, and in some cases even to taste
them! These acids are known as weak acids.
What is an acid ?

4. Some acids, like those found in the laboratory or a car battery,
They are too dangerous to taste or touch.
These acids are said to
be corrosive as they can
damage other materials
by wearing them away.
These are strong acids.
What safety precautions should you take when handling a
strong acid?

5. Now since you know what acid
is let’s see some reactions
with acid
We will start by the reaction
between metal and acid
Let’s goooo !!!

6.  When an acid react with metal they produce salt plus hydrogen so
the general equation we use is :
Acid + metal -> salt + hydrogen
Here are some words equation : -
Hydrochloric acid + sodium -> sodium chloride + hydrogen
Sulfuric acid + calcium -> calcium sulfate + hydrogen
Nitric acid + potassium -> potassium nitrate + hydrogen

7. Metal and acid reactions
When an acid react with
metal, you can see the
hydrogen gas being
released.
With more reactive
metal, you will see a
more vigorous
reaction.

8. Metal and acid reactions Most reactive
Least reactive
Magnesium
Zinc
Iron
lead
Some metals do not
react with dilute acid,
so you won’t see
metals such as copper,
silver or gold react in
your experiment.

10. Metal carbonates and acids
When a metal carbonate reacts with an acid, the products are a salt,
carbon dioxide and water :
Metal carbonate + acid -> salt + carbon dioxide + water
Hydrochloric
Acid
Carbonate
How can we prove
carbon dioxide was
made?

11. Test for Carbon dioxide...
Carbon dioxide turns
LIMEWATER cloudy!
+

13. So guys,
This is the end of our lesson. Hope you
understand.
If you want to test your knowledge please click on
this link below.
We appreciate you listening and see you in the
next lesson.
https://quizizz.com/join?gc=48640474

14. PREPARED BY :
Habiba ahmed
Aya Shouckair
Aroma Naem
Jannah Yasser