For the standardization of their sodium hydroxide solution a pair of students weighed out 0.5342 g of khp (mm 204.22 g/mol). they found that it took 21.36 ml of their naoh solution to reach the endpoint. what is the concentration of their naoh solution?

The concentration of their NaOH solution is 0.1225 M.

Explanation:

Moles of KHP :

Given, Mass of KHP = 0.5342 g  

Molar mass of KHP = 204.22 g/mol

The formula for the calculation of moles is shown below:

Thus,

According to the reaction shown below:

KHP + NaOH ⇒ KNaP + H₂O

1 mole of KHP reacts with 1 mole of NaOH

So,

of KHP reacts with of NaOH

Moles of NaOH =

Volume = 21.36 mL = 0.02136 L ( 1 mL = 0.001 L)

The expression for molarity is:-

The concentration of their NaOH solution is 0.1225 M.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.