CLASS PRESENTATION - SODJessica Perry

QUESTION• Will heat be released during Acid / Base

chemical reactions?

HYPOTHESIS• I hypothesize that some chemical

reactions will produce heat and some will not.

• I think that reactions with stronger chemicals will produce heat.

PH CHART14 Liquid drain cleaner, Custic Soap

Examples of solutions and their respective pH

13 bleaches, oven cleaner

12Soapy water

11Household ammonia

10milk of magnesium

9toothpaste

8baking soda, seawater, eggs

7"pure" water

6milk

5acid rain, black coffe

4tomato juice

3grapefruit & orange juice, soft drink

2lemon juice, vinegar

1hydrochloic acid secreted from the stomach lining

0battery acid

MATERIALS AND PROCEDURE

MATERIALS• Acids (200 ml each)

– Lemon juice

– Vinegar

– Soft drink

– Orange juice

– Coffee

– Milk

• Bases (200 ml each)– Baking soda

– Toothpaste

– Milk of magnesium

– Ammonia

– Bleach

– Drain cleaner

MATERIALS (CONT.)• Beakers

• Digital thermometer

• Data sheet

• Distilled water

• Graduated cylinder

• Litmus paper

PROCEDURE•Procedure 

1. Put 100ml distilled water and thermometer in a beaker2. Stir to a constant temp.3. Record temp.4. Put 50ml acid and 50ml base in separate containers 5. Make each chemical constant temperature6. Record temp.7. Add acid and base to beaker with distilled water at same time8. Record temp. every 2 seconds for 20 sec.9. Clean beakers10.Repeat with all acid / base combinations

DATA AND GRAPHS

MILK WITH EACH BASE

LEMON JUICE WITH EACH BASE

ORANGE JUICE WITH EACH BASE

VINEGAR WITH EACH BASE

SODA WITH EACH BASE

DATA CHARTS• The data charts show the acid on top and

the bases listed down the side

• The temperatures are listed in 2 second intervals horizontally across the chart

• The reaction with the base on top and the acids on the side

MILK DATA CHART

Milk

Milk of magnesium 17 17 17 17 17 17 17 17 17

bleach 17.5 17.9 18.1 18.4 18.7 18.9 19.3 19.4 19.5

Drain cleaner 17.3 17.6 17.7 17.9 18 18.2 18.4 18.8 18.5

Ammonia 16.4 16.4 16.4 16.4 16.4 16.4 16.4 16.4 16.4

Baking soda 14.7 14.3 14.2 14.1 14.0 13.8 13.7 13.6 13.6

ORANGE JUICE DATA CHART

Orange Juice

Ammonia 17.2 17.2 17.2 17.3 17.3 17.3 17.3 17.3 17.3 17.3

Drain cleaner

17.8 18.2 18.4 18.5 18.9 18.9 19.0 19.0 19.1 19.1

Bleach 17.3 17.7 18.1 18.4 18.5 18.7 18.7 18.8 18.9 18.9

Milk of magnesium

16.3 16.4 16.5 16.6 16.6 16.6 16.7 16.7 16.7 16.8

LEMON JUICE DATA CHART

Lemon Juice

Baking Soda

17.8

17.1

17.0

16.9

16.7

16.6

16.6 16.7

ammonia 12.2

13.4

13.5

13.6

13.6

13.6

13.6 13.6 13.6 13.6

Milk of magnesium

20.8

21.2

21.3

21.7

22 22.4

22.5 22.6 22.7 22.8

Drain cleaner

18.2

19.4

20 20.2

20.2

20.3

20.4 20.6 20.7 21

Bleach 17.8

18.5

18.9

19.2

19.6

19.8

20 20.3 20 21.3

SODA DATA CHART

Soda - Coke

bleach 17.4

17.5 17.5 17.6 17.6 17.6 17.6 17.6 17.6 17.6

Milk of magnesium

17.4

17.5 17.5 17.5 17.6 17.6 17.6 17.6 17.6 17.6

Drain cleaner

17.5

17.6 17.5 17.7 17.7 17.8 17.8 17.8 17.8 17.9

Ammonia 16.9

16.9 17.0 17.0 17.0 17.0 17.0 17.0 17.0 17.0

Baking soda

13.7

14.0 15.8 13.4 15.8 13.4 13.3 13.1 13.1 13.6

MILK DATA CHART

milk

Milk of magnesium

17 17 17 17 17 17 17 17 17 17

Bleach 17.5

17.9

18.1 18.4 18.7 18.9 19.3 19.4 19.4 19.5

Drain cleaner

17.3

17.6

17.7 17.9 17.9 18 18 18.4 18.8 18.5

Ammonia 16.4

16.4

16.4 16.4 16.4 16.4 16.4 16.4 16.4 16.4

Baking soda

14.7

14.3

14.2 14.1 14 13.8 13.7 13.6 13.6 13.6

PICTURE

LEMON JUICE AND BAKING SODA

This is how full it was

before the

baking soda

CONCLUSIONAcid / base reactions do produce heat. With

different strength chemicals more or less heat is produced. My hypothesis was correct in that there was heat produced in most acid base reactions.