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Surface Area and Rate of Reaction Investigation

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Surface Area and Rate of Reaction Investigation

Aim- To determine how the surface area of marble chips (CaCo3) affects
the rate of reaction when placed in hydrochloric acid.

Below there’s two diagram of hydrogen ions and layer of atom and the
other diagram is the hydrogen ions being spilt up.

Equipment list- the equipment I will be using for this experiment to
see how the surface area of marble chips (caco3) affect the rate of
reaction when placed in hydrochloric acid, are 25 ml of hydrochloric
acid, 3g of marble chips, graduated cylinder, a stop clock, test tube,
250 ml beaker, delivery tube, scale, ceramic mount, and a plastic
dish.

Method- First I fill up a small container will regular tap water from
the taps of the school science table filling it up three-quarters of
the way up. After I lay a delivery tube in the middle of the container
plus straight on top the delivery tube place a ceramic mount. Now I
get a 250ml beaker and place in it 25 ml of hydrochloric acid, after
that connect both the bucket and beaker with the delivery tube. Now I
get a stop clock that is accurate for experiment. Now I carefully,
simultaneously put 3 gram of CaCo3 (marble chips) into the beaker with
HCL (Hydrochloric acid) in it and start the stop clock.

Prediction- My prediction is that the powdered marble chips (CaCo3)
will be a faster rate of reaction when it is placed in the
hydrochloric acid (HCL). The marble chips in powder form made this
happen, as they have a much larger surface area then unpowdered marble
chip. This will be showing to the hydrochloric acid faster making it a
quicker reaction. But if the marble chips are put in when it wasn’t
powder form then it would have little surface area are touching the
hydrochloric acid and as a result the reaction will take more time
then the powdered marble chips. Whilst the chemical reaction occurs
the particles of the reactants collide, but if they have a collision
with sufficient energy then bonds will form between the particles. If
there’s is not a sufficient amount of energy to make a chemical
reaction then the particle will bounced of each other. Activation
energy is the energy required to split the bonds of the reactants so
the atoms can merge to form the product.

Here are the results in table form of the experiment below.

Caco3

10ml

20ml

30ml

40ml

50ml

Small

Medium

Large

20

90

50

34

106

85

50

122

105

67

140

150

82

124

124

Small

Medium

Large

20

24

28

28

39

47

33

50

51

39

65

70

47

80

90

Small

Medium

Large

11

24

25

17

41

50

23

56

70

28

74

90

34

84

112



Averages
========

Small

Medium

Large

18

47

33

26

61

59

35

76

75

44

91

104

54

96

108

[IMAGE][IMAGE]

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Conclusion- This experiment showed me that my prediction about the
experiment was right after all. My results prove that my prediction
was right, as the powdered marble chips will have a quicker rate of
reaction whilst putting the hydrochloric acid then the non-powdered
marble chips. So the small pieces of the marble chips have a larger
surface area as I said before when I was predicting before as when
they are placed into the hydrochloric acid, when the marble chips
particles collide more with the hydrochloric acid particles and bonds
were made involving the two particles making the chemical reaction
faster. The surface areas are less when the marble chips are larger
and that means the particles will collide at a slower rate causing
fewer bonds to form and therefore a slower reaction-taking place. As a
result the experiments I placed the powdered chips into the
hydrochloric acid the product were produced quicker. When it produces
the carbon dioxide it was small because of too many collision. While
being placed in the hydrochloric acid the large marble chips took
longer to produce then the smaller ones, as the carbon dioxide too
longer and not many collisions so the progress was longer.



Evaluation- This experiment was to show how the surface area of the
marble chips affects the rate of reaction when placed in hydrochloric
acid. The variables are controlled exactly and each time I repeated
the experiment so the same like the before ones. The thing that’s were
changed were only the variables that had to be changed to do the
experiment. Difference was that the marble chips were used could never
be the same size for each repeat of the experiment. The same I get the
same size marble chips for each repeat of this experiment and it is
suitable and glitch of a mistake. So this data support my prediction
and shows that I am correct. I may perhaps experiment on a larger
selection of surface area and experiment with different acid to
additional my work more.

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"Surface Area and Rate of Reaction Investigation." 123HelpMe.com. 30 Jul 2014
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