What is the chemical equation for KHP and NaOH?
We have a balanced chemical equation in which we now know the exact quantity of one of the reagents (KHP) – NaOH(aq) + KHC8H4O4(aq) = KNaC8H4O4(aq) + H2O(l) – thus we can determine the number of moles of NaOH that reacted with the KHP. These are two terms that often lead to some confusion.
What is the reaction between KHP and NaOH?
reaction is called a neutralization reaction because two caustic compounds, KHP, a mild acid, and NaOH, a strong base, are replaced by water and a weaker base.
How do you standardize NaOH with KHP?
To Standardize: Weigh ~0.8 g of dried KHP (MW = 204.23 g/mol) into an Erlenmeyer flask and dissolve in 50-75 mL of distilled water. Record the amount of KHP and water used. Add 4 drops of indicator into the flask and titrate to the first permanent appearance of pink.
How many moles of KHP react with NaOH?
In this reaction as well, one mole of KHP completely reacts with one mole of NaOH. 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.
Why do we use NaOH in titration?
During the course of the titration, the titrant (NaOH) is added slowly to the unknown solution. After the equivalence point, there will be an excess of NaOH and the solution will be basic. An acid-base indicator can be used to help identify when the change from acidic to basic occurs.
What is the chemical formula for KHP?
How do you standardize NaOH?
To standardize NaOH, start by pipetting 10.0 ml of 0.1 N hydrochloric acid (HC1) into a flask. Add approximately 50 ml of water (remember, not tap water) and three drops of methyl red indicator. Fill a 25 ml buret with the 0.1 N sodium hydroxide solution and record the initial volume.
Is NaOH a strong base?
A strong base is something like sodium hydroxide or potassium hydroxide which is fully ionic. You can think of the compound as being 100% split up into metal ions and hydroxide ions in solution. Each mole of sodium hydroxide dissolves to give a mole of hydroxide ions in solution.
Why do we use Khp to standardize NaOH?
KHP is slightly acidic, and it is often used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. It is not hygroscopic.
How do you standardize NaOH with oxalic acid?
Add about 25 mL of deionized water and 3 drops of phenolphthalein to the oxalic acid. Swirl the mixture to dissolve the oxalic acid. Read the buret to the nearest 0.01 mL, and titrate the oxalic acid with NaOH. The end point has been reached when the pale pink color of the phenolphthalein persists for 30 seconds.
What does it mean to standardize the NaOH solution?
Standardization is the process of determining the exact concentration (molarity) of a solution. In the first standardization the molarity of a sodium hydroxide solution (NaOH) will be determined by titrating a sample of potassium acid phthalate (KHP; HKC8H4O4) with the NaOH.
How do you calculate the molarity of NaOH?
First determine the moles of NaOH in the reaction. From the mole ratio, calculate the moles of H2SO4 that reacted. Finally, divide the moles of H2SO4 by its volume to get the molarity.
How many moles are in NaOH?
How do I calculate the concentration of a solution?
The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters. Note that the volume is in liters of solution and not liters of solvent.