$**********$NEED HELP WITH $2\mathrm{.}3$ ESPECIALLY PLEASE $********$ AC $2\mathrm{.}2$

Perform calculations based on results of titrations to obtain a valid result.

$($a$)$ Suppose you carried out a titration experiment in which you recorded an average volume of $26$ cm$3$ of dilute hydrochloric acid $($HCl$)$ by titration with $0\mathrm{.}05$ moldm$-3$ and $25$ cm$3$ of potassium hydroxide $($KOH$).$ Calculate the concentration of the hydrochloric acid.

Write a balanced formula equation using the word equation given below, for the reaction:

hydrochloric acid $+$ potassium hydroxide $->$ potassium chloride $+$ water

Equation: $.............+.............->................+.............$

$($b$)$ Suppose the laboratory Technician carried out the same titration experiment in which he$/$she recorded an average volume of $24\mathrm{.}5$ cm$3$ of the dilute hydrochloric acid $($HCl$)$ by titrating with $0\mathrm{.}05$ mol dm$-3$ and $25$ cm$3$ of potassium hydroxide $($KOH$).$ Calculate the concentration of hydrochloric acid from the Technician$$s experiment.

Write a balanced formula equation using the word equation given below, for the reaction:

hydrochloric acid $+$ potassium hydroxide $->$ potassium chloride $+$ water

Equation: $............+................->...............+............$

Summary of steps involved in the above calculation of the concentration of the acid solution:

Complete a balanced equation for the reaction.

Calculate the amount $($moles$)$ of potassium hydroxide in $25\mathrm{.}00$ cm$3.$

Use this to find the amount $($moles$)$ of acid used to react with the potassium hydroxide

Calculate the concentration of the acid using the amount $($moles$)$ of acid and the average of your concordant results.

AC $2\mathrm{.}3$

Analyse the results of an acid $$ base titration & review the method used.

$1.$ Subtract the concentration of hydrochloric acid obtained using your results in $($a$)$ above from the concentration obtained using the Technician$$s results in $($b$)$ above:

$2.$ Compare the two values of concentration of the acid and calculate the percentage difference between them using the relationship below:

$\%$ difference $=$ difference between $2$ concentration values x $100$

Technician$$s concentration value

$3.$ Calculate systematic $($apparatus$)$ error.

$\%$ Error $=$ error of equipment x $100$

amount measured

Standard errors in apparatus are as follows:

$25\mathrm{.}0$ cm$3$ pipette: $\backslash$pm $0\mathrm{.}06$ cm$3$

Burette $($use $24$ cm$3)$: $\backslash$pm $0\mathrm{.}1$ cm$3$