Acids

Ello everyone! I'm back again, this time about acids that can BURN you.

Here is a short introduction on acids!

1. Acids have a pH of less than 7. (7 is NEUTRAL)
2. Acids are substances that produce H+ ions in water. 
3. Sour Taste (Please don't try don't you will burn your tongue, probably) 
4. Dissolves in water to form solutions that conduct electricity

How do we test if a solution/liquid is a acid. We can't possibly drink it, right? Here's one experiment we did, and it can help us determine which solution is an acid. Here are the following steps:

1. Firstly, take some blue and red litmus paper and place both pieces on a white tile. 
2. Next, drip a drop of the solution onto each piece of paper. 
3. Fill a test tube with the universal indicator solution.
4. Drip a drop of the solution into the test tube.
5. Observe and record your observations down. 

Basically, what you should get is the following results:

1. The blue litmus paper turns red, and the red litmus paper remains red. 
2. The universal indicator solution, which was green in our case, turned red. 

Here are some videos for you to see the changes! 

We did two other experiments on acids, but we did not video them or take any pictures because the reactions were rather fast. Let me describe in words the experiments we did! 

In the other two experiments, we basically mixed acid with carbonate and metal respectively by themselves, which means the second experiment was acid plus carbonate, while the third experiment was acid plus metal. Basically, this entire experiment time was to see what happens when acids react with other substances/materials. 

In general, we learnt 3 equations after that lesson. They are general equations which will help you in your paper (; *hints* 

1. Metal + Acid --> Salt + Hydrogen 
2. Base/Alkali + Acid --> Salt + Water
3. Carbonate + Acid --> Salt + Water + Carbon Dioxide

Hope you learnt more! See you soon!! :D