Grade Seven Presentation on acid and base.pptx

This is a presentation to introduce acid and base in year 7

1. 7 TH GRADE 7 TH GRADE Prepared By: Kissiedu Yirenkyi ACID AND BASE

2. By the end of the lesson, learners will be able to; define the terms ‘acid’ and ‘alkali’. list the properties of acids and alkali Success Criteria know the definition of acid and alkali list the properties of acid and alkali Objectives

3. WHAT DOES IT TASTE LIKE?

4. WHAT DOES IT TASTE LIKE?

5. WHAT DOES IT TASTE LIKE?

6. WHAT DOES IT TASTE LIKE?

7. WHAT DOES IT TASTE LIKE?

8. 7 TH GRADE 7 TH GRADE Prepared By: Kissiedu Yirenkyi ACID AND BASE

9. ACID • Are substances that tast sour. • Latin word “acidus” (means sour) • Not all acid taste sour, the sourness can vary in different acid. Properties of Ex. Grapes, Coffee, Vinegar, Oranges and etc.

10. • Tu rns litmus paper red /pink. • C ontain s H ydrogen ions (H+) that they release when dissolved in water .

11. BASE • Are substances that tast bitter. • Also known as alkaline. Properties of Ex. Ditergent, shampoo, baking soda and etc. • When added to water give foam and feel slippery to the touch.

12. • Tu rns litmus paper Blue. • C ontain s H ydro xide ions ( O H - ) that they release when dissolved in water .