Tech @ Tamaki Stem/Science

Task 1: Understand what pH is.

pH = potential of hydrogen

What is pH? pH is how acid is measured.

How do you measure pH? The pH value can be measured using electrochemical measuring systems, litmus paper, or indicators and colorimeters.

What is the scale of pH measured on? pH is a measure of how acidic/basic water is. The range goes from 0 - 14.

What pH level does water have? Is water acid, basic, or neutral? Neutral

What is the most acidic pH level? It is 0

What is the most basic pH level? It is 8-14

0-6 is acidic

7 is neutral

8-14 is basic

0 battery

1 stomach acid

2 lemon juice

3 grape juice

4 tomato juice

5 soft drinks

6 saliva/urine

7 pure water

8 sea water

9 baking soda

10 great salt lake

11 ammonia solution

12 soapy water

13 bleach

14 drain cleaner

Atom = simplest form of matter

Atom = neutral

More hydrogen ions - acid

Bases = have hydroxide ions

When things go into water they dissolve and become acids and lose 1 electron.

Task 2: Doing experiment

Aim/Purpose: Test the pH levels in different household products.

Equipment: Well Plate, pH strips/litmus paper,pH chart table (0-14),Dropper

Products: Baking soda, distilled water, window cleaner,toilet bowl cleaner, lemon juice, milk, orange juice, apple juice, vinegar, detergent,tea/coffee

Substance	Acid/base, (prediction)	Colour changes from? (Litmus paper)	Result, (acid or base?)
Baking soda	Base (correct)	Blue to blue Red to blue	Base
Distilled water	Base (wrong, neutral)	Blue to blue Red to Red	Neutral
Window cleaner	Acid, (basic)	Blue to blue Red to blue, (slightly)	Basic
Toilet bowl cleaner	Acid, (correct)	Blue to red Red to red	Acid
Lemon juice	Acid, (correct)	Blue to red Red to red	Acid
Milk	Base, (neutral or acid)	Blue to blue Red to red	Mixture of neutral and/or acid
Orange juice	Acid (correct)	Red to red Blue to red	Acid
Apple juice	Acid, (correct)	Blue to red Red to red	Acid
Vinegar	Acid, (correct)	Red to red Blue to red	Acid
Detergent	Acid, (correct)	Blue to red Red to red	Acid
Tea/coffee	Base, (acid)	Red to red Blue to red	Acid

 Hey everyone, it's me Finau and welcome back to my blog. We went to tech and went to science class. We were learning about pH. I already knew some things about pH but I learnt more. Our teacher was not Mrs Sharma, it was Mrs Smallwood. I worked with Aye. I enjoyed the lesson and learnt some things about acids. I hope you have enjoyed this post. Please leave a positive comment on my blog. Bye!