Science Test - pH Potential of Hydrogen, Balancing Equations,

  1. H+ is Acid or Hydrogen Ion

  1. OH- is a base alkylid or Hydroxide

  1. a weak base has a pH of 6

  1. A weak alkali has a pH of 9

  1. both H+ (acids) and OH- (bases) are created from H20 (water)

  1. H+ was created when the hydrogen atom left the H2O molecule but had to leave behind an electron

  2. OH- was created when the hydrogen atom left the H2O molecule was left with an extra electron

Cabbage Indicator Experiment

  1. Water will make cabbage pH indicator turn blue

  2. vinegar will make cabbage pH indicator turn red

  3. baking soda will make cabbage pH indicator turn blue

  4. A strong acid will make cabbage pH indicator turn red

  5. A strong alkali will make cabbage pH indicator turn yellow

  1. A weak alkali will make cabbage pH indicator turn green

  2. A weak acid will make cabbage pH indicator turn purple

  3. If combine vinegar in cabbage pH indicator and add baking soda what will be the colour changes red → blue → purple

Elephant Toothpaste Experiment

  1. Hydrogen peroxide chemical formula is H₂O₂

  2. Hydrogen Peroxide decomposes into H₂ + O₂

  3. Hydrogen Peroxide decomposes naturally over time. It can be sped up a little with light and heat

  4. In this experiment, the yeast is the Catalyst

  5. The purpose of a catalyst in a chemical reaction is to speed up the reaction time

  6. the purpose of the dish soap in the Hydrogen Peroxide experiment was to capture the oxygen

  7. The container gets warm because heat is released in the chemical reaction

pH Scale:

1 = Stomach Acid (HCl, Hydrochloric Acid) = Strong Acid = Red

2 = Lemon Juice = Strong Acid = Redish Purple

3 = Vinegar = Strong Acid = Redish Purple

4 = Tomato = Weak Acid = Purple

5 = Coffee Black = Weak Acid = Purpleish Blue

6 = Milk = Weak Acid = Purpleish Blue

7 = Water = Neutral = Blue

8 = Blood = Weak Base = Blueish green

9 = Baking Soda = Weak Base = Blueish green

10 = Tums (Ant-acid) = Weak Base = Green

11 = Ammonia (Windex) = Strong Base = Greenish yellow

12 = Soap = Strong Base = greenish yellow

13 = Bleach = Strong Base = greenish yellow

14 = Drain Cleaner (NaOH, Sodium Hydroxide) = Strong Base = Yellow