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Experiment 1: What Household Substances are Acidic or Basic? Table 1: pH values of common household substances
Substance|pH Guess|pH Paper|
Sodium bicarbonate solution|8|~7.5|
Orange Juice |5|~3.5|
Hand soap |8|~9|
Lemon juice |4|~2.5|
Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations. Vinegar – Acidic with a low pH of around 3.
Sodium – Basic – with a higher pH scale around 7.5
Milk – I thought would be basic but it’s actually more acidic, around 6.5 Orange Juice – Acidic actually around 3.5
Hand soap – Basic around 9 pH
Lemon juice - most acidic thing I tested around 2.5
Name two acids and two bases you often use.
Acids: I drink Orange Juce everyday along with milk.
Basics: Hand Soap and toothpaste
Experiment 2: The Effect of Surface Area and Volume
Table 2: Results from surface area to volume experiment
Cube Dimensions|Surface Area (cm2)|Volume (cm3)|Surface Area : Volume|Time Require for Complete Color Change|Distance of Diffusion| 1 cm x 1 cm x 1 cm|6cm2|1cm3|6:1|4|3/4|
1 cm x 2 cm x 2 cm|16cm2|4cm3|4:1|5|full|
1 cm x 1 cm x 6 cm|26cm2|6cm3|13:3|3|1/2|
How did the surface area affect the diffusion of the cube? What about the volume? What about the surface area to volume ratio? Which of...
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