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In: Chemistry

Explain the effect on your calculated acid concentration if the following error occurred: 1)The dilute HCL...

Explain the effect on your calculated acid concentration if the following error occurred:

1)The dilute HCL was over-diluted in the volumetric flask.

2)The flask that the student added the dilute acid to before the titration was wet.

Solutions

Expert Solution

1) The standard solutions are prepared in volumetric flasks. While preparing solution of dilute HCl required amount of HCl is added to the water and then the flask is filled upto the mark. If the acid is over diluted that is more water is added to the solution then the concentration of the the acid will decrease (with increase in dilution).

2) During the titration volume of base × concentration of bade equals to number of moles of base and this is used to determine number of moles of acid in the solution. The titration is carried out to get volume of base which is used to neutralise the acid and since we know volume of acid added to the flask, concentration of acid is carried out. The presence of water in the flask will change the volume of the acid but will not affect the number of moles of acid present neither the initial volume added to flask is changed in each titration. Therefore, flask being wet before the titration will not lead to any error in the calculated acid concentration.

queen_honey_blossom answered 2 years ago
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