Which of the following will reduce copper? zinc mercury fluorine chlorine
2 answers:
<u>Answer:</u> The correct answer is Zinc.
<u>Explanation:</u>
Reactivity is defined as the tendency of an element to loose or gain electrons. Metals which loose electrons easily will be considered as more reactive metal.
The reactivity of elements will be judged on the basis of reactivity series. The elements which lie above in the series are more reactive than the elements which lie below in the series. The metals which lie above in the series will easily reduce the metals which lie below in the series.
Copper is the metal which lie above mercury and below zinc.
Thus, zinc is more reactive metal than copper and hence will easily reduce copper from its reaction.
Hence, the correct answer is Zinc.
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The pH of the buffer is 6.1236.
Explanation:
The strength of any acid solution can be obtained by determining their pH. Even the buffer solution strength of the weak acid can be determined using pH. As the dissociation constant is given, we can determine the pKa value as the negative log of dissociation constant value.
The pH of the buffer can be known as
The concentration of
Similarly, the concentration of [HA] =
Then the pH of the buffer will be
pH = 6.247 + log [ 0.304/0.404]
So, the pH of the buffer is 6.1236.