A liquid has a low boiling point and is a poor conductor of electricity. The liquid could be which of the following? select all
1 answer:
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<u> </u> The pH of 0.035 M aqueous aspirin is 2.48
<u>Explanation:</u>
We are given:
Concentration of aspirin = 0.035 M
The chemical equation for the dissociation of aspirin (acetylsalicylic acid) follows:
<u>Initial:</u> 0.035
<u>At eqllm:</u> 0.035-x x x
The expression of for above equation follows:
We are given:
Putting values in above expression, we get:
Neglecting the value of x = -0.0037 because concentration cannot be negative
So, concentration of = x = 0.0033 M
- To calculate the pH of the solution, we use the equation:
We are given:
= 0.0033 M
Putting values in above equation, we get:
Hence, the pH of 0.035 M aqueous aspirin is 2.48
Answer:
Option D ()
Explanation:
Acids react with metal to form salt and hydrogen gas.
Metals which are more reactive than hydrogen evolve hydrogen gas on reaction with acid.
For example:
Magnesium reacts with hydrogen chloride to form magnesium chloride and hydrogen.
2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)
Al and Zn are more reactive than hydrogen, therefore, these metals evolve hydrogen gas on reaction with acid.
reacts with HCl to form NaCl and nitric oxide.
reacts with HCl to form potassium chloride, carbon dioxide and water.
As reaction of does not evolve any gas, therefore, the correct option is D.