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Montano1993 [528]
3 years ago
14

1. Why were atoms given the name of "atom" which means "unable to be cut?"

Chemistry
1 answer:
alexandr1967 [171]3 years ago
3 0

Answer:

These particles were considered so small that they were unable to be cut

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Consider a voltaic cell where the anode half-reaction is Zn(s) → Zn2+(aq) + 2 e− and the cathode half-reaction is Sn2+(aq) + 2 e
Sonbull [250]

Answer:

Option (B) is correct

Explanation:

Oxidation: Zn\rightarrow Zn^{2+}+2e^{-}

Reduction: Sn^{2+}+2e^{-}\rightarrow Sn

---------------------------------------------------------------------------

Overall: Zn+Sn^{2+}\rightarrow Zn^{2+}+Sn

Nernst equation for this cell reaction at 25^{0}\textrm{C}:

E_{cell}=(E_{Sn^{2+}\mid Sn}^{0}-E_{Zn^{2+}\mid Zn}^{0})-\frac{0.059}{n}log\frac{[Zn^{2+}]}{[Sn^{2+}]}

Where, n is number of electron exchanged and species inside third bracket represents concentrations in molarity.

Here, n = 2, E_{cell}=0.660V and [Zn^{2+}]=2.5\times 10^{-3}M

So, plug in all the given values into above equation:

0.660V=(-0.136V+0.76V)-\frac{0.059}{2}log\frac{2.5\times 10^{-3}M}{[Sn^{2+}]}

So, [Sn^{2+}]=4.2\times 10^{-2}M

As the value "0.059" varies from literature to literature and 4.2\times 10^{-2}M is most closest to 3.3\times 10^{-2}M therefore option (B) is correct.

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Explanation:

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