Table of Contents
- 1 What is the purpose of diluting your samples in HNO3 instead of water?
- 2 Why should the solution be acidified with nitric acid?
- 3 Why is 0.01 M HNO3 used as a diluent rather than deionized water in the preparation of the stock solution 0.01 M HNO3 is used?
- 4 Is HNO3 soluble in water?
- 5 Why is nitric acid HNO3 important?
What is the purpose of diluting your samples in HNO3 instead of water?
Dilute nitric acid prevents the adsorption of trace level heavy metal ions by glass. Hence before storing low concentration heavy metal ions, glass bottles or standard measuring flasks must be washed with dilute nitric acid. HNO3 is the best for sample treatment for çaa.
What is the role of HNO3 in this process?
HNO3 acts as a base in the nitrating mixture and provides the electrophile NO2+ .
Why should the solution be acidified with nitric acid?
Acidification with nitric acid improves chemical characteristics and reduces phytotoxicity of alkaline chars.
Why is nitric acid used to clean?
Nitric acid clean (HNO3CLEAN) Wear protective gear (eye protection and nitrile gloves). Nitric acid can be used to clean glass. It does this by leeching the ions from within the surface of glass.
Why is 0.01 M HNO3 used as a diluent rather than deionized water in the preparation of the stock solution 0.01 M HNO3 is used?
Why is 0.01M HNO3 used as a diluent rather than deionized water? In the preparation of the stock solution, 0.01M HNO3 is used. Dilute to correct volume important because it makes molar concentration of standards more precise.
What is the purpose of the acidification of water sample before analysis?
The addition of an acid (usually nitric or sulfuric) to a sample to lower the pH below 2.0. The purpose of acidification is to fix a sample so it will not change until it is analyzed.
Is HNO3 soluble in water?
Nitric acid
| Names | |
|---|---|
| Density | 1.51 g cm−3, 1.41 g cm−3 [68\% w/w] |
| Melting point | −42 °C (−44 °F; 231 K) |
| Boiling point | 83 °C (181 °F; 356 K) 68\% solution boils at 121 °C (250 °F; 394 K) |
| Solubility in water | Miscible |
What is the importance of nitric acid?
Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.
Why is nitric acid HNO3 important?
nitric acid, (HNO3), colourless, fuming, and highly corrosive liquid (freezing point −42 °C [−44 °F], boiling point 83 °C [181 °F]) that is a common laboratory reagent and an important industrial chemical for the manufacture of fertilizers and explosives. It is toxic and can cause severe burns.
Why is nitric acid used instead of hydrochloric acid?
Nitric acid is used because all nitrate salts are soluble in water. If we use H2SO4 or HCl they will produce sulphate or chloride salts. Some metal sulphates and chlorides are not very soluble in water. Nitric acid also an oxidising agent, additioanlly breaking down the organic components better than some other acids.