state the PH of the following salt solutions and why?
Magnesium sulphate, Ammonium chloride, Sodium acetate, Lead nitrate
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1.ph value of magnesium sulphate is between 5.5 to 6.5
2.ph value of ammonium chloride is between 4.6 to 6.0
3.ph value of sodium acetate is around 9
4.ph value of lead nitrate is 6.5.
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Answer:
1) MgSO4 = Mg(OH)2 + H2(SO4)
sulfuric acid is strong acid hence, salt is acidic. Ph<7
2) NH4Cl = NH3 + HCl
hydrochloric acid is strong acid and ammonia is weak base hence salt is acidic.
Ph<7
3) C2H3NaO2 = NaOH + CH3COOH
NaOH is strong base and acetate is weak acid hence salt is basic.
Ph> 7
4)PbNO3 = Pb + HNO3
nitric acid is strong acid hence salt is acidic.
Ph < 7
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