Investigation of Factors that Affect the Rate of Reaction Between Limestone
PLANNING SECTION
Aim:
To investigate the factors that affect the rate of reaction between
limestone and hydrochloric acid.
Introduction:
Text Box: CaCO3 + HCl = CaCl2 + CO2 + H2O calcium carbonate + hydrochloric acid = calcium chloride + carbon dioxide + water
In this investigation I am trying to find out what influences the
reaction rate between limestone and hydrochloric acid. The reaction
is:
The factors that can be investigated are the concentration of the
hydrochloric acid, the temperature, and making the surface area of the
limestone bigger.
Limestone is formed from fossil remains of shells and is a sedimentary
rock, which contains almost 100% calcium carbonate (CaCO ). When it is
heated it decomposes and produces quicklime (CaO) and carbon dioxide.
It is an ingredient used in cement and glass and has appropriate
physical properties to be used as an aggregate. This is used where a
solid foundation is needed such as under concrete floors, roads and
railway tracks. Limestone can also be used to produce a cheap alkali
that neutralises acids in lakes and soil.
For my preliminary experiment I used 3g of 3mm limestone chips, 50ml
of hydrochloric acid and 500cm3 of distilled water. I tested three
different molarities of hydrochloric acid and timed how long the
reaction between the acid and limestone took to produce 50 cm3 of
carbon dioxide.
I am going to change the concentration of the hydrochloric acid, and
after that I will change the surface area of the limestone. This will
give me two sets of results. For the experiment using different
molarities of acid, I will use 3g of 3mm limestone chips throughout
the whole thing. For the experiment using different surface areas of
limestone chips, I will use 3g all the time and use 2 moles of acid.
Prediction:
I predict that when changing the concentration of the acid, the
reaction will go faster. This is because the more concentrated the
the ones that contains ppt in half, then add 6M NH3 to one set of them
to the marble chips. I will have 30 ml of mixture and split it in to
CaCl2 + H2O + CO2
Reaction 2: H = 50 x 4.18 x -10.3" H = -2152.7 This value is for 1.37g of calcium oxide, not 56.1g, which is its relative molecular mass. Therefore: H =
This is called copper oxide. The copper carbonate has been decomposed. Copper oxide is made by thermal decomposition of copper carbonate. Carbon dioxide is also made. The formula for this is: Copper Carbonate =
Strong heating of calcium carbonate produces calcium oxide, CaO, and carbon dioxide. tlcQeA from tlcQeA coursewrok tlcQeA work tlcQeA info tlcQeA CaCO3(s) à ƒaO (s) + CO2 (g)coce cer sececew orce cek ince foce ce. Limestone is given the equation CaO, slaked lime is produced when CaO reacts with water, this is where further amount of H2O is added which turns this into a saturated aqueous solution known as limewater. Ca(OH)2 (aq) and is used for tests to show the presence of CO2.
because it is the easiest to do! All the rest I will have to keep the
The aim is to find out if changing the concentration of the hydrochloric acid solution has an effect on the time taken for the reaction. The reaction that will take place is: Hydrochloric acid + Calcium Carbonate + Calcium Chloride + Water + Carbon dioxide 2HCl (aq) + CaCo3 (s) CaCL2 (aq) + H2O + CO2 (g). Collision theory - Collisions between reactant particles are needed. for the reaction to take place in order to form a product.
acids. I only tried the 1 molar acid, but if I were to repeat the
Cl- (aq) + Na+ (aq) + OH- (aq) Na+ (aq) + Cl- (aq) +H+ + OH- [IMAGE]The above is an example of a neutralization reaction, involving an acid and an alkali. The result is a salt and water. In every neutralization reaction, the metal in the alkali (Na+ here) takes the place oh the hydrogen in the acid, forming a metal compound called a salt.
I blanked it with 2 cm³ water, 1 cm³ amylase and 3 drops of iodine.
I will not add a catalyst to my solution and I will not stir my solution. · I will use 25cm3 of hydrochloric acid. · I will use 1g of calcium carbonate.
The Effect of Temperature on the Rate of Reaction Between Hydrochloric Acid and Calcium Carbonate
An investigation into how changing one variable influences the rate of reaction between marble chips and dilute Hydrochloric acid
I predict that the following reaction will occur: [IMAGE]CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O + CO2(g) I also predict that after a certain amount time all the reactants will run out and only the product will be left, only then will the reaction end. Variables A variable is anything which affects the results of an experiment, for example, the variable could affect the speed the particles move or the amount of energy needed in a reaction. For this experiment, there are many variables we could use.