How do I go about finding the concentrations I need to use in order to for this lab? I don't even know where to begin.

Use the Virtual Laboratory to standardize the unknown NaOH solution (approximately 0.2M) to four significant figures via titration with 25.00 mL of a KHP standard solution. What must be the minimum concentration of the KHP solution to yield the required accuracy in the NaOH results? Note that the buret should be read to 2 decimal places.

 

Answer:

so,  potassium hydrogen phthalate or KHP (C₈H₅O₄K) is weak acid and NaOH is strong base solution. Titration is to be done for this with indicator

Informative is that one mole of KHP completely reacts with one mole of NaOH.

Step-by-step explanation

1)A procedure can be like, NaOH is an extremely hygroscopic solid. When solid NaOH is weighed using an electronic balance it will absorb moisture from the atmosphere; this leads to inaccuracies in the mass of the sodium hydroxide and thereby inaccuracies in its molarity calculations. for this problem, a sodium hydroxide solution of approximate molarity is prepared first. This solution is titrated with an acid whose molarity is known with greater accuracy. The data from this titration is then used to calculate a more accurate value for the molarity of the sodium hydroxide solution. Acid that will be used to determine the molarity of the sodium hydroxide is referred to as the Primary Standard,and commonly used primary standard for titration with sodium hydroxide solution is the weak acid potassium hydrogen phthalate or KHP (C₈H₅O₄K).

The reaction between KHP and NaOH is given below

C₈H₅O₄K + NaOH---- C₈H₄O₄KNa + H₂O

The titration of NaOH with KHP involves adding NaOH from the burette to a known volume of KHP. The molarity of the KHP solution is determined from the mass and volume of KHP used to prepare the KHP solution. The data from the titration is then used to calculate the molarity of the NaOH.