Which of the following characteristics is common to both acids and bases? a. They produce ions when dissolved in water. b. They
2 answers:
Answer: a. They produce ions when dissolved in water.
Explanation:
Acid : It is a substance that has ability of donating proton or hydrogen ion, when dissolved in water.
Acids are sour in taste.
The texture of an acid solution is sticky.
It changes the color of the litmus paper to red.
Base : It is a substance that has ability of donating hydroxide ion, when dissolved in water.
Base are bitter in taste.
The texture of an base solution is slippery.
It changes the color of the litmus paper to blue.
Thus both acids and bases produce ions when dissolved in water.
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Answer: d) -705.55 kJ
Explanation:
Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.
Reversing the reaction, changes the sign of
On multiplying the reaction by , enthalpy gets half:
Thus the enthalpy change for the given reaction is -705.55kJ