What acid and what base would you choose to prepare the salt potassium perchlorate (kclo4)?
2 answers:
Answer : The perchloric acid and potassium hydroxide base is used to prepare the salt of potassium perchlorate,
Explanation :
when the perchloric acid react with the potassium hydroxide as a base to form a salt of potassium perchlorate,
The balanced chemical reaction will be,
By the stoichiometry, we can say that 1 mole of perchloric acid react with the 1 mole of potassium hydroxide base to give 1 mole of potassium perchlorate and 1 mole of water as a product.
Hence, the perchloric acid and potassium hydroxide base is used to prepare the salt of potassium perchlorate,
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Answer: b. is positive and
is positive.
Explanation:-
As the temperature of the pack drops, the energy has been absorbed from the pack for dissolution of in water. Thus as the energy has been absorbed in the reaction, the reaction is endothermic and the change in enthalpy i.e.
is positive.
The entropy is the measure of degree of randomness. The entropy increases when the randomness increases and the entropy decreases when the randomness decreases. When a substance dissolves in water, it dissociate into ions and hence the randomness increases thus the change in entropy i.e. is positive.
