п»їCopper sulphate experiment
There are a number of numerous methods of producing salts, like the reaction of a metal with an chemical p. Copper metallic, however , doesВ notВ react with sulphuric acid and so another technique must be used. From this experiment a simple copper chemical substance (copper(II) oxide) will be responded with sulphuric acid offering copper(II) sulphate as one of the items. Method
1 . Wear goggles and keep the face away from the beaker during the effect 2 . Place 20 cmm3 sulphuric acid into a 90 cm3 beaker
3. Put spatulas of copper carbonate carefully and stir the mixture (a lot) using a starring pole (not the spatula) to react all of the copper carbonate with chemical p. 4. Continue to keep adding water piping carbonate until no more can react and green copper mineral carbonate left unreacted in the bottom of the beaker. This will make sure that all the chemical p is used up. 5. Filtering the solution to remove unreacted copper carbonate
6th. If there is time, concentrate the answer by evaporating a little of this particular off more than a Bunsen burner (slowly). several. Leave the solution on the window sill along with your name over a piece of paper to compere evaporation by the very next time the lesson will take place.
1 . 32
Paper + residue/g
three or more. 96
installment payments on your 52
This is calculated from your moles of sulphuric acid used.
n = cv
C= you mol
v= 0. 020 dm3
n=0. 020 mol/dm3
Actual mass = installment payments on your 52 g
Theoretical mass sama dengan 0. 020 x [63. 5+32. 1+(4x16)+(5x18)]
0. 020 x 249. 6=4. 992
Percentage produce = genuine mass x 100
=2. 52 x100
Genuine mass= (Paper + residue) вЂ“ (filter paper)
= 3. 96 вЂ“ 1 ) 32 =2. 64
STRYGE (%) sama dengan (Desired)/ (Total Products)
Wanted пѓ mass в€‘ (desire product)/ mass в€‘ (all products) 2 different ways to make copper sulphate
CuO(s) + H2SO4(aq) в†’ CuSO4(aq) + H2O(l)
159. 6th + 18= 177. 6th
159/177. 6th x 90 =89. 86486%
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