# The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is (A) 56 g (B) 28 g (C) 42 g (D) 20 g

R Shyam Sundar
15 Points
4 years ago
For complete neutralisation,
2KOH+CO2 gives K2CO3 + H2O
For 11.2dm^3 i.e.,11.2L(half mole) we need 1mole KOH.
So weight of KOH is 56g

Vikas TU
14149 Points
4 years ago
Dear student
Weight of 11.2 dm^3 of CO2 gas at STP = 44/2 = 22 gram
KOH + CO2 -> KHCO3
KOH required = 56/44  * 22 = 28 gram
B is correct ans.
Hope this helps
Good Luck
The passage contains a chemistry problem that involves a calculation to determine the mass of KOH required to neutralize a given volume of CO2 gas. Two different answers are provided by two different contributors.
multiple_questions_with_answers
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
# The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is (A) 56 g (B) 28 g (C) 42 g (D) 20 g

R Shyam Sundar
15 Points
4 years ago
For complete neutralisation,
2KOH+CO2 gives K2CO3 + H2O
For 11.2dm^3 i.e.,11.2L(half mole) we need 1mole KOH.
So weight of KOH is 56g

Vikas TU
14149 Points
4 years ago
Dear student
Weight of 11.2 dm^3 of CO2 gas at STP = 44/2 = 22 gram
KOH + CO2 -> KHCO3
KOH required = 56/44  * 22 = 28 gram
B is correct ans.
Hope this helps
Good Luck
user
The passage contains a chemistry problem that involves a calculation to determine the mass of KOH required to neutralize a given volume of CO2 gas. Two different answers are provided by two different contributors.

TYPE: MULTIPLE_QUESTIONS_WITH_ANSWERS