How do you find the concentration of NaOH using Khp?
How do you find the concentration of NaOH using Khp?
1. The number of moles of KHP is found by dividing the mass of KHP by the molecular weight of KHP. 2. The number of moles of NaOH is found by multiplying the moles of KHP by the mole ratio of NaOH to KHP given by the above, balanced chemical reaction.
Why do you need to standardize NaOH solution?
Unfortunately, NaOH is not a suitable primary standard. Solid NaOH is highly hygroscopic (it absorbs water from the air) and thus it cannot be accurately weighed. This procedure is called standardizing the NaOH solution. Once this concentration is determined, the NaOH solution can serve as a standard for further work.
How do you prepare a NaOH solution?
Making 1 N solution of NaOH To make 1 N solution, dissolve 40.00 g of sodium hydroxide in water to make volume 1 liter. For a 0.1 N solution (used for wine analysis) 4.00 g of NaOH per liter is needed.
What is the need of standardization?
Standardization also brings innovation, first because it provides structured methods and reliable data that save time in the innovation process and, second, because it makes it easier to disseminate groundbreaking ideas and knowledge about leading edge techniques.
How can titration be improved?
Acid Base Titration Sources of Error Improvements
- Check the calibration of the balance.
- Verify that the primary standard is properly dried.
- Verify the precision of the glassware.
- Use sufficient quantities of analyte and titrant.
- Realize the limitations of the equipment.
What is the Colour change in EDTA titration?
EDTA is short for ethylenediaminetetraacetic acid. A blue dye called Eriochrome Black T (ErioT) is used as the indicator. This blue dye also forms a complex with the calcium and magnesium ions, changing colour from blue to pink in the process. The dye–metal ion complex is less stable than the EDTA–metal ion complex.
What is the role of buffer solution in EDTA titration?
A buffer solution is used in EDTA titration because it resists the change in pH. This is because all the reactions between the metal ions and EDTA are pH-dependent.
Which indicator is used in EDTA titration?
To carry out metal cation titrations using EDTA, it is almost always necessary to use a complexometric indicator to determine when the end point has been reached. Common indicators are organic dyes such as Fast Sulphon Black, Eriochrome Black T, Eriochrome Red B, Patton Reeder, or Murexide.