Ask a Doubt
Request a call back

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

CBSE Class 11-science Answered

Answer question no. 9 and question no. 11.
question image
Asked by tps.mjmdr | 10 Jul, 2018, 10:27: PM
answered-by-expert Expert Answer
 
To identify the limiting reagent, first write the chemical reaction,
 
space space space Li subscript 2 straight O subscript open parentheses straight s close parentheses end subscript space space space plus space space straight H subscript 2 straight O subscript open parentheses straight g close parentheses end subscript space space space space rightwards arrow with blank on top space space 2 LiOH subscript open parentheses straight s close parentheses end subscript space 29.88 space straight g space space space space space space space space 18 space straight g space space space space space space space space space space space space space space 47.95 space straight g As space 29.88 space straight g space space space Li subscript 2 straight O space gives space space 47.95 space straight g space LiOH space 65 space kg space equals space 65000 space straight g space of space space space Li subscript 2 straight O Then comma space space 65000 space straight g space of space space space Li subscript 2 straight O space will space give space space fraction numerator 47.95 cross times 65000 over denominator 29.88 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 104308.90 space straight g space of space space LiOH space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 104.3 space kg space space of space space LiOH 80 space kg space space equals space 80 comma 000 space straight g space of space straight H subscript 2 straight O 18 space straight g space straight H subscript 2 straight O space gives space space 47.95 space straight g space space LiOH 80000 space straight g space straight H subscript 2 straight O space will space give space space space fraction numerator 80000 cross times 47.95 over denominator 18 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 213111.1 space straight g space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 213.1 space Kg As space the space space space Li subscript 2 straight O space is space forming space less space quantity space of space LiOH space then space water comma space space space Li subscript 2 straight O space is space straight a space limiting space reagent. 104.3 space kg space space of space space LiOH space is space formed space by space fraction numerator 104.3 cross times 18 over denominator 47.95 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 39.39 space kg Excess space water space left space equals space 80 space minus space 39.39 space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 40.6 space kg space of space straight H subscript 2 straight O
 
Limiting reagent is Li2O
 
Excess of reactant remain is 40.6 kg.
 
 
Molality is preferred over molality because:
 
Molarity is the number of moles of solute present in one litre of solution.
 
Molality is the number of moles of solute present in 1 kg of solvent.
 
In the case of molarity, the change in temperature causes the change in volume of the solution but in molality, the temperature will not affect the weight of the solvent.
 
Therefore molality is preferred over molarity in expressing the concentration of a solution.
Answered by Varsha | 13 Jul, 2018, 12:49: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Chemistry
what is stotiometery
Asked by hm6561889 | 15 Apr, 2024, 07:45: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
what is iota
Asked by ansh.skulkarni1158 | 07 Apr, 2024, 11:03: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
I2 + NO3- = NO2 + IO2
question image
Asked by VarunTYAGi9013 | 21 Oct, 2023, 07:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
what is chemistry
Asked by pujakum60022 | 11 Jun, 2023, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
can we see weight and pressure these entities
Asked by vibhutimandal70 | 26 Jun, 2022, 10:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
The atoms of different elements are different in nature. Justify this statement by giving suitable arguments.
Asked by sd8022567 | 10 Jun, 2022, 11:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
-Inductive effect is more for -OH or -OR?
Asked by Bhathika1434 | 13 Oct, 2020, 07:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
what is empirical formula of compound?
question image
Asked by tiparsemahesh | 04 Oct, 2020, 07:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
calculate the percentage of carbon in 22% pure co2
Asked by nirajrane1234 | 09 Sep, 2020, 09:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Calculate number of electrons present in 8 gram of CH4^+
Asked by Ssajal020 | 25 Aug, 2020, 06:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×