[填空题]
Potassium hydrogen phth*q1pxn8 qtwh 0pz2 g;db1wbl 9ao3 .z iop,(qpulate or KHP $(C_8H_5O_4K)$ is an acidic salt compound which is commonly used to standardize sodium hydroxide (NaOH) solutions. The reaction between KHP and NaOH is given below.
$KHC_8H_4O_4+NaOH$$\rightarrow$$KNaC_8H_4O_4$+$H^2O$
1.Calculate the mass of KHP needed to prepare $25.00cm^3$ of 0.100mol $dm^{-3}$ KHP solution. g
2.Calculate the volume of $1.0mol\:dm^{-3}$ aqueous NaOH solution needed to prepare $50cm^3$ of 0.100mol $dm^{-3}$ aqueous NaOH solution. $\times10^{-3}dm^3$
3.If 27.1 $cm^{3}$ of the KHP solution prepared in (a) were needed to standardize $25.0cm^3$ of the aqueous NaOH solution prepared in (b), calculate the exact concentration of the aqueous NaOH solution. mol $dm^{-3}$
