Did you know soda drinks, right? Now, have you ever wonder why don't drink too much? Then, let's know about acids and alkalies. In a Ph (Power of Hydrogen) meter instrument as known as Litmus Paper, you will find that a soda drink has a medium acids. The Ph of soda drinks are 2,8. For stomach acid, the Ph is 2. Now, what is Ph meter? How does it work?Ph (or Power of Hydrogen ) metering instrument is a Litmus paper. To test an object is acids or alkalies, make the object to liquid and put 2 Litmus paper (one blue, and one red) into the liquid. If the litmus paper didn't turn into other color(red/blue), it means the Ph is 7 or Neutral. If it's lower than 7, it means acids.
Acids are sour(sometimes), and can be corrosive if they are strong, even can "eat up" metals and flesh. There are 4 types of acids :
- Strong acids : 0-2.
- Medium acids : 3
- Weak acids : 4-5
- Very weak acids : 6-6,9.
To neutralize acids, use alkalies. Alkalies is an opposite of acids. Alkalies in Ph meter is higher than 7. Alkalies are bitter, and can be corrosive too if they are strong, even could burn skin. There are 4 types of alkalies :
- Very weak alkalies : 7,1-8
- Weak alkalies : 9-10
- Medium alkalies : 11
- Strong alkalies : 12-14
This is a chemistry subject for 7th grades. If this helping, please like it.
Source : Natasha Setianto ; Grade 7th chemistry Junior High school SMP Sekolah Dian Harapan Mentawai , Lippo Karawaci, Tangerang, Banten, Indonesia.
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