Grade 7 Science Quarter 1 Acids and Base

Acids and Bases

1. 4 pics 1 word Link

2. ACIDS AND BASES

3. Objective/s: Determine the acidity or basicity of some common household products using the pH scale

4. READ THE WORDS FLASHED ON THE SCREEN AND IDENTIFY SOME PRODUCTS FOUND AT HOME 1. Acetic Acid Household Product W ord Vinegar 2.Sodium   Hypochlorite Bleach 3. Hydrochloric Acid Muriatic Acid 4. Sodium Chloride Salt

5. pH Scale – a method used to indicate the acidity or basicity of mixtures It extends from 0 to 14 and was proposed by a Danish biochemist named S.P.L. Sorensen

6. In your Math subject, how do we scale a number line?

7. Based on the Figure, what does the range from 0 – 14 indicate? How about the pH of greater than 7, what does it indicate?

8. Which one between gastric juice and tomato is more acidic? Why?

9. What is the pH value of the human blood? How will you compare it to the urine

10. What have you observed with the pH scale values? Is it increasing or decreasing?

11. How does the pH scale help us when it comes to the acidity and basicity of products?

12. What are acids and bases? An acidic mixture has a pH that is less than 7. A basic mixture has a pH that is greater than 7. Acidic substances are sour in taste while basic or alkaline substances are bitter or soapy in taste.

13. Identify the acidity and Basicity of the following products using actions: SOAP WATER CITRUS Basic Neutral Acidic

14. Identify the acidity and Basicity of the following PHOTOS OF products: NEUTRAL

15. Identify the acidity and Basicity of the following PHOTOS OF products: ACIDIC

16. Identify the acidity and Basicity of the following PHOTOS OF products: ACIDIC

17. Based on the activities, how can we measure the acidity and basicity of products? We could determine the acidity and basicity of a product by its taste or odor or by using the pH scale

18. As part of the History, how did the development of the pH scale allows scientists to define the acidity and basicity of a substance? The development of the pH scale allowed the scientists to determine the pH level of substances based on its hydrogen content

19. Short video about acids and bases https://www.youtube.com/watch?v=V5Mq_cL9Bck After watching the video, w hy do you think we need to determine the acidity or basicity of household products?

20. Quiz:

21. Direction: Determine the acidity or basicity of some common household products by completing the table. Put a check (  ) mark under the appropriate classification of each given matter.

22. Assignment: Fill in the blanks below using the terms inside the box. The interaction that occurs between acids and bases in which the properties of each are cancelled out by the other is called (1) __________. It is the reaction between (2) ________ and (3) _________. The products of this reaction are (4) _________ and (5) ________.

23. Reminder: bring the following products on wednesday . Plant Indicator Vinegar Distilled water Tap water Baking soda Baking powder Calamansi Toothpaste Shampoo Soap Detergent Fruit juice ( buko juice) Sugar in water Soft drinks (sprite)

24. Thank you for listening and god bless us all!