Consider the following equilibrium for nitrous acid, HNO2 aweak acid:HNO2 (aq) + H2O (l) H30' (aq) + NO2(aq)ΔΗ > O麷 mIn which direction (shift, if:-a) NaOH is added?Left, Right or No effectwill the equilibriumSelect l- b) NaNO2 is added?I Select ]c) HCI is added?I Select ]d) The acid solution is made more dilute?l SelectNext

Question
Asked Feb 20, 2019
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Consider the following equilibrium for nitrous acid, HNO2 a
weak acid:
HNO2 (aq) + H2O (l) <-> H30' (aq) + NO2(aq)
ΔΗ > O
麷 m
In which direction (
shift, if:
-a) NaOH is added?
Left, Right or No effect
will the equilibrium
Select l
- b) NaNO2 is added?
I Select ]
c) HCI is added?
I Select ]
d) The acid solution is made more dilute?
l Select
Next
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Consider the following equilibrium for nitrous acid, HNO2 a weak acid: HNO2 (aq) + H2O (l) <-> H30' (aq) + NO2(aq) ΔΗ > O 麷 m In which direction ( shift, if: -a) NaOH is added? Left, Right or No effect will the equilibrium Select l - b) NaNO2 is added? I Select ] c) HCI is added? I Select ] d) The acid solution is made more dilute? l Select Next

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Expert Answer

Step 1

Consider the given equilibrium equation for nitrous acid, HNO2.

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Step 2

a) Addition of NaOH:

NaOH produces OH- ions. OH- ion uses up H3O+.

According to Le Chatelier’s principle, addition of NaOH consumes the hydronium ion on the product side and therefore, to balance the equilibrium, production more of hydronium ion takes place.

Hence, the equilibrium will shift towards right.

Step 3

b) Addition of NaNO2:

NaNO2 produces of more of NO2- ions.

According to Le Chatelier’s principle, addition of NaNO2 contributes more of NO2- ions on the product side. Therefore, in order to maintain equi...

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