Disappearing Cross Experiment
Plan
====
I must produce a piece of coursework investigating the rates of
reaction. The rate of reaction is the rate of loss of a reactant or
the rate of formation of a product during a chemical reaction. There
are five different factors, which affect the rate of a reaction
(1) Temperature
(2) Concentration of a solution
(3) Pressure of gases
(4) Surface area of solids
(5) And catalysts.
I have chosen to investigate the effect temperature has on a reaction.
If I'd of had enough time, I would of done an experiment for
concentration of Hydrochloric acid to see what difference the rate of
reaction would be here. I wouldn't do pressure of gases, as most are
'invisible' to the human eye. I wouldn't do surface area of a solid,
as the two substances we are looking at are liquids. I wouldn't use a
catalyst in the experiment, because firstly I wouldn't know which
catalyst to use and secondly it may alter the outcome of the
experiment if used incorrectly.
· Aim
=====
To plan and carry out an experiment to discover how to change the rate
of reaction. The reaction being studied is between sodium thiosulphate
(Na2S203) and hydrochloric acid (HCl). The reaction I am using is:
Sodium Thiosulphate + Hydrochloric acid ->
Sodium Chloride + water + sulphur dioxide + sulphur
Na2S203 (aq) + 2HCl (aq) -> 2NaCl (aq) + H20 (l) + SO2 (g) + S (s)
· Equipment
[IMAGE]
· Diagram
· Method
1) With a piece of paper put on a bold cross, which is easy to see.
2) Put the conical flask on top of the cross with 20ml³of hydrochloric
acid.
3) Add 20ml³ of sodium thiosulphate into another flask and heat to
specific temperatures with the Bunsen burner (and using a
thermometer).
4) Once it is at the correct temperature, add it to the hydrochloric
acid and start the stopwatch.
In the experiment “ Talking to plants “ from Mythbusters, potential problems include the use of greenhouses with no sound insulation, a non-homogeneous location and the use of only one specie to infer on a population. In another scientific study, researchers chose to use “ a noiseless growth chamber to prevent any effects from extraneous noise “ and the use “ growth chambers under continuous light at 28 c and 65-75% relative humidity “ in order to maintain a homogeneous location for all plants during the experiment (Jeong et al., 2008) . This helped further explain the findings because with the use of noiseless chambers you can assure that the only noise that the plant was receiving was the one given in the treatment and a valid conclusion
need is water and an ester and we will end up with an organic acid produced as
The equation shows how 1 mol of Na2CO3 reacts with 1 mol of H2SO4, so
"Make the symbol of the cross--you must be Catholic--I see them doing that all of the time." I was eager to know what my friend's response would be.
an enzyme is used to speed up the process in the equation above. In my
Hydrochloric acid + calcium carbonate arrow calcium chloride + carbon dioxide + water. HCl(aq) + CaCO3(s) arrow CaCl2(aq) + CO2(g) + H2O(l) Things that affect the reaction rate of this experiment are: 1. The temperature of the hydrochloric acid. 2.
CaCl2 + H2O + CO2
Herein did the Shape of Evil dip his hand, and prepare to lay the mark of baptism upon their foreheads, that they might be partakers of th...
Around the crown: "Glory to God in the highest and on earth peace, good will toward men - Luke, chapter II, verse 14."
... the Bible every night, or pray once in the morning and again at night, both times at the foot of the bed. The only thing that matters is that one acknowledges Christ’s existence, lets him into their life, and fully embraces him in all endeavors.
Bible and put them into action. This can be done in a number of ways
As more NaOH is added, the pH will become more basic as H2C2O4 .2H2O has been completely neutralized and now an excess of OH- ions are present in the solution.12
And the symbol equation for it is:. Na2S2O3 + 2HCl, S + SO2 + 2Na + H2O. Before conducting my experiment, I will research into, amongst other things, the factors that affect the rate of a reaction. This is so that I may have enough information to understand the effect of temperature on the rate of a reaction and also gain appropriate understanding to make a suitable prediction as to what the outcome of my experiment will be. Reactions occur when the particles of reactants collide together continuously.
" Let the word of Christ dwell in you richly as you teach and admonish one another with all wisdom, and as you sing psalms, hymns and spiritual songs with gratitude in your hearts to God."
to you by your forefathers, but with the blood of Christ, a lamb without blemish or defect."