Chemistry revision presentation on section b dan c past year paper = ogos 2011

Year 2007 No 7c) REVISON ON SALT

(c) Table 7 shows the observations from some tests carried out on salt X. Test Observation I: Heating of salt X solid A metal oxide is formed and a brown gas is given off II. Salt X solution is mixed with excess aqueous ammonia A white precipitate which is insoluble in excess aqueous ammonia is formed

Based on the information in Table 7: (i) Identify an anion that is present in Test I and describe a chemical test to verify the anion [4m] ,[object Object]

Based on the information in Table 7: (i) Identify an anion that is present in Test I and describe a chemical test to verify the anion [4m] Chemical test: ,[object Object],[object Object],[object Object],[object Object],[object Object]

(ii) Identify three cations that are present in Test II and describe a chemical test to verify the cations. [6m] ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Confirmatory test using Na 2 SO 4 : ,[object Object],[object Object],[object Object],[object Object],OR

Confirmatory test using KI solution : ,[object Object],[object Object],[object Object]

[object Object],[object Object],SPM 2007 NO : 9a

Diagram 9 shows how compound G is formed from alkene Alkene + H 2 O Compound F Compound G + H 2 O Phosphoric acid, 300 O C, 60 atm Porcelain chips

(i) Name one alkene that has less than four carbon atoms. Draw its structural formula. or ethene propene

ii) Based on your answer in 9 ai) what is the name of compound F and Compound G Name of alkene ethene propene Name of Compound F ethanol propanol Name of Compound G ethene propene Alkene + H 2 O Compound F Compound G + H 2 O Phosphoric acid, 300 O C, 60 atm Porcelain chips

iii) State three chemical properties of compound F and three properties of compound G ,[object Object],[object Object],[object Object],[object Object],Alkene + H 2 O Compound F Compound G + H 2 O Phosphoric acid, 300 O C, 60 atm Porcelain chips

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Alkene + H 2 O Compound F Compound G + H 2 O Phosphoric acid, 300 O C, 60 atm Porcelain chips

[object Object],SPM 2007, Q: 9b

Alkenes, alcohols and carboxylic acids are three different homologous series. Construct a table to show the general formula , the functional group and the name of a member in each of the series.

HMLGOS SERIES ALKENE ALCOHOLS CARBOXYLIC ACIDS GEN FORMLA C n H 2n n= 2,3, 4… C n H 2n+1 OH n= 1,2, 3…. C n H 2n+1 COOH n=0,1,2….

HOMOUS SERIES ALKENE ALCHOLS CARBXIC ACIDS FUNCTN GROUP Carbon- carbon double bond (-C=C-) Hydroxyl (-C-OH) Carboxyl ( -COOH )

HOMOUS SERIES ALKENE ALCOLS CARBYLIC ACIDS NAME OF MEMBER ethene ethanol Ethanoic acid OR propene propanol Propanoic acid OR butene butanol Butanoic acid

Year 2007 question no 10 REVISON ON thermochemistry

data from Exp I and Exp II that were carried out to study the rate of reaction of zinc with two acids, P and Q. Exp Reactants Products Observation I 2.6 g of zinc and 50 cm 3 of acid P 2.0 mol dm -3 Zinc chloride and hydrogen gas The temperature of the mixture increases II 2.6 g of zinc and 50 cm 3 of acid Q 2.0 mol dm -3 Zinc sulphate and hydrogen gas The temperature of the mixture increases

[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

∆ H E- activattion energy without catalyst E’- activattion energy with catalyst energy Energy profile diagram of reaction zinc and hydrochloric acid

SPM 2008 QUESTION 8 REVISION ON Section B - electrochemistry

Diagram 8.1 shows the apparatus set up for the electrolysis of sodium chloride solution using carbon as electrode

(a) State the factors that determine the products formed at electrode P and electrode Q ,[object Object],[object Object]

b ) Explain the reactions at electrode P and Q. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chemistry revision presentation on section b dan c past year paper = ogos 2011

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Chemistry revision presentation on section b dan c past year paper = ogos 2011