Consider the reaction below. Which species are conjugate acid/base pairs? H2SO3 (aq) + CN (aq) HSO3 (aq)HCN (aq) A) HSO3, CN B)
1 answer:
Answer : The correct option is, (B)
Explanation :
According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.
Or we can say that, conjugate acid is proton donor and conjugate base is proton acceptor.
The given equilibrium reaction is,
Here, is loosing a proton, thus it is considered as an acid and after losing a proton, it forms
which is a conjugate base. That means,
are act as a conjugate acid-base pairs.
Hence, correct option is, (B)
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Answer: d) 164.9 g
Explanation:
To calculate the moles :
The balanced chemical reaction is:
According to stoichiometry :
2 moles of require = 25 moles of
Thus 0.412 moles of will require=
of
Mass of
Thus 164.9 g of oxygen is consumed.
Answer: There are 0.0637 moles present in 85.0 mL of 0.750 M KOH.
Explanation:
Given: Volume = 85.0 mL (1 mL = 0.001 L) = 0.085 L
Molarity = 0.750 M
It is known that molarity is the number of moles of solute present in liter of a solution.
Therefore, moles present in given solution are calculated as follows.
Thus, we can conclude that there are 0.0637 moles present in 85.0 mL of 0.750 M KOH.