Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

Find the ratioof molar amount of H2S needed to precipitise metal ions from 20ml each of 1M Cd(NO3)2 and 0.5M CuSO4
Asked by Sridhar | 16 May, 2019, 12:05: PM
answered-by-expert Expert Answer
Chemical equations-
 
left parenthesis 1 right parenthesis space straight H subscript 2 straight S plus Cd left parenthesis NO subscript 3 right parenthesis subscript 2 rightwards arrow CdS plus 2 HNO subscript 3
space space space space space space space 1 space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space 1 space space space space space space space space space space 1

Moles space of space Cd left parenthesis NO subscript 3 right parenthesis subscript 2 equals 1 over 1000 cross times 20 equals 0.02 space mole
So space according space to space stoichiometry space of space chemical space equation comma space moles space of space straight H subscript 2 straight S space needed equals 0.02 space moles

left parenthesis 2 right parenthesis straight H subscript 2 straight S plus CuSO subscript 4 space rightwards arrow CuS plus straight H subscript 2 SO subscript 4
space space space space space space space 1 space space space space space space space space space space space space 1 space space space space space space space space space space space 1 space space space space space space space space space space 1

Moles space of space CuSo subscript 4 space equals fraction numerator 0.5 over denominator 1000 end fraction cross times 20 equals 0.01 space mole

Hence comma space according space to space the space above space reaction comma space moles space of space straight H subscript 2 straight S space needed equals 0.01 space moles

Therefore comma space the space ratio space of space molar space amount space of space straight H subscript 2 straight S space needed space will space be equals 0.02 colon 0.01 equals 2 colon 1
Answered by Ravi | 16 May, 2019, 06:03: PM
CBSE 11-science - Chemistry
Asked by brijk456 | 22 Aug, 2019, 11:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by theraianurag1 | 04 Jun, 2019, 01:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by Sridhar | 16 May, 2019, 12:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by vishakhachandan026 | 19 Apr, 2019, 09:46: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×