Question

The time required for completion of the reaction, when we add 2 mL of 1M HCl to the flasks
A, B, C and D containing increasing order of concentration of 0.1 M Na2S203

a. increases
b. decreases
c. first decreases and then increases
d. first increases and then decrease​

Answer 1

Answer:

D option is the correct

Explanation:

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Answer 2

Answer:

The correct option is (d) first increases and then decrease.

Explanation:

• Hydrochloric acid and sodium thiosulfate combine to produce sulphur and sulphur dioxide .
• Hydrochloric acid and sodium thiosulfate combine to produce sulphur and sulphur dioxide .By plotting the concentration of Na2S2O3 as a function of both the reaction time and 1/time, the kinetics of the reaction can be examined.
• When concentration and time are plotted, a curving line results that levels off as it gets closer to the x-axis, meaning that the reaction slows down as reactant concentration rises.
• Reaction time and reaction rate are negatively related.
• A straight line results from plotting concentration versus 1/time.
• The reaction appears to be first order with regard to the concentration of sodium thiosulfate, and the rate is exactly proportional to concentration.
• The products of the molar concentration of reactants directly affect the rate of the reaction.
• The rate of the reaction, which takes place between aqueous solutions of Na2S2O3 and HCl, is directly influenced by the product of the molar concentrations of the two reactants.

Na2S2O3 (aq) + 2HCL (aq) → H2O (l) + SO2 (g)+ 2 NaCl (aq) + S (s)

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