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(5c)
(i)
- P is Ca^2a+,Calcium ion
Q is magnesium ion
Ca^(2a+)+H2(^+) + O2(^2-)->Ca(OH)2





(ii)
To the unknown substance in the container, add copper(II)tetraoxosulphate(IV)solution, If a blue precipitate is formed. This confirms the presence of water.


(iii)
-Furring of kettle and boiler
-Stalagmite and Stalactite


(iv)
Na2SO4 + Ca(OH)2->CaSO4 + NaOH


(5b)
(i)
-Solubility is the amount of solute of moles in which can dissolve in 1dm^3 of solvent at standard temperature and pressure
-Sateurated solution is the solution in which contains more solute than it can dissolve at a particular temperature


(ii)
-Temperature
-Surface area of solid

(iii)
Given; mass of Z=10.2g
Volume(V)=15.4cm^3
Temperature=40degreesC
Molar mass of Z=331
Mole=10.2g/331gmol
Solubility=Mole/Volume
=0.031/(15.4*1000)
=2*10^-6mol/dm^3

(5a)
(i)-hydrogen chloride
(ii)-They are soluble in water
(iii)-They are less dense than air



(1a)
Esterification is the reaction between organic acid e.g ethanoic acid and organic base e.g ethanol to produce salt e.g alkanoate and water


(1b)
-Low melting point
-Low thermal capacity


(1b)
Duralumin cosist of aluminium,magnesium amd manganese


(1d)
-Raw materials is the chemical or physical materials in its natural or uncombined form
-Primary product is the useful product during chemical reactions


(1e)
Charles law states the volume of a fixed ma$$ of a gas is directly proportional to the temperature provided pressure remains constant


(1f)
-Eye shades
-Laaboratory coats
-Hand gloves
-Spatula


(1g)
-Ammonia is used as a refrigerant in refrigerators
-Ammonia is used in production of amine and amide

(1h)
-Cracking
-Sodium Ethanoate
–


(1i)
H2S04=0
(1*2)+S+(-2)4=0
2+S-8=0
S-6=0
S=6


(1j)
-Sodium trioxochlorate(v)
-Copper(ii)tetraoxosulphate pentahydrate


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