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Thursday, 29 July 2021

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! 

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