Tag: WAEC Chemistry Sample Questions

WAEC GCE Chemistry Essay Answers Live

Filed in West African Examinations Council by on September 16, 2015 1 Comment

Chemistry Essay Answers (1a) (i) Mass concentration of B=3.95/750*1000 =5.2g/dm VA=22.70cm^3 VB=25.0cm^3 (ii) Concentration of B in mol/dm^3 =Concentration in g/dm^3/Molar mass in g/mol Molar mass of Na2CO3 =(23*2)+(12)+(16*3) =46+12+48 =106g/mol Concentration in mol/dm^3=5.27/106 =0.0497mol/dm^3 (iii) CAVA/CBVB=nA/nB (CA*22.70)/(0.0497*25)=1/1 CA=(0.0497*25*1)/22.70*1) CA=0.0548mol/dm^3 (iv) CA=concentration in g/dm/molar mass Molar mass of A=H2SO4 =(1*2)+32+(16*4) =2+32+64 =98g/mol 0.0548=concentration in g/dm^3/98 […]

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WAEC Chemistry Scheme and Sample Questions

WAEC Chemistry Scheme and Sample Questions. There will be three papers, Papers 1, 2 and 3 all of which must be taken. Papers 1 and 2 will be a composite paper to PAPER 1:   Will consist of fifty multiple choice objective questions drawn from Section A of the syllabus. Candidates will be required to answer […]

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