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Investigating How Different Concentrations Affect the Rate of Reaction
In this investigation I am investigating the effect of one factor on
the rate at which calcium carbonate reacts with hydrochloric acid. I
have decided to change the concentration of the acid to investigate
how different concentrations affect the rate of reaction, and to
discover what amount, at which concentration releases a higher
quantity of gas. There are other factors, which could have been used
as the variables.
My method is as follows I will measure out 2 grams of marble chips
using the scales, and add them into a conical flask and 20ml of
hydrochloric acid into a measuring cylinder. I then added the acid
into the conical flask with the marble chips and started the clock
straight away. After time periods of every 30 seconds I measured the
amount of gas in the syringe, this will continue until one of two
things happened. Either the volume of the gas syringe gets past 100cm
and it is necessary for the back of the gas syringe to be taken out,
otherwise it could drop out and smash, or the volume of gas remains
constant for 1 minute, and then that particular experiment will end.
1Molar Room temperature-27 c.
1M Room temperature-27'c.
Time
Time
Experiment 1
------------
(Large chips)
Experiment 2
(Small chips)
Experiment 1
(Large chips)
Experiment 2
(Small chips)
Experiment 3
(Small chips)
Experiment 3
(Small chips)
0
0
0
0
20
21
6
21
40
49
17
43
60
73
28
59.5
80
93
38
71.5
100
47
79.5
120
54
85.5
140
60
89.5
160
65