Why could you not substitute h2so4 for hno3 in Part A?
Sulfuric acid cannot be substituted for nitric acid because aqua regia requires a strong oxidant, and sulfuric acid is not one; but sodium nitrate can often be used as a substitute for nitric acid.
How do you find the concentration of HCl?
Step 3: Calculate the concentration of hydrochloric acid in mol/dm 3
- Concentration in mol/dm 3 =
- Concentration in mol/dm 3 =
- = 0.125 mol/dm 3
- Relative formula mass of HCl = 1 + 35.5 = 36.5.
- Mass = relative formula mass × amount.
- Mass of HCl = 36.5 × 0.125.
- = 4.56 g.
- So concentration = 4.56 g/dm 3
What volume of NaOH is required to reach the equivalence point?
0.04398 L
A mole is equal to 6.022 x 1023 molecules.) By doing the titration and making a plot of the volume of NaOH added versus the resulting pH of the solution, we find that the equivalence point occurs at 0.04398 L of NaOH.
What is the use of NaOH in the assay of HCl?
Consider this example in which a sample of hydrochloric acid (HCl) is titrated with sodium hydroxide (NaOH). During the course of the titration, the titrant (NaOH) is added slowly to the unknown solution. As it is added, the HCl is slowly reacted away.
What happens when nitric acid reacts with Sulphuric acid?
Sulphuric acid(H2SO4), NO2 and water are formed when concentrated nitric acid reacts with sulphur.
What is the concentration of hno3?
Dilutions to Make a 1 Molar Solution
| Concentrated Reagent | Formula Weight1 | Molarity (M) |
|---|---|---|
| Hydrochloric Acid (HCl) | 36.461 | 12.1 |
| Hydrofluoric Acid (HF) | 20.006 | 28.9 |
| Nitric Acid (HNO3) | 63.013 | 15.6 |
| Perchloric Acid (HClO4) | 100.46 | 11.7 |
How do you calculate volume of HCl?
Concentrated hydrochloric acid has concentration of 12.19 mol/litre, The molar mass of HCl is 36.458 g/mol. 125 g is therefore (125/36.458) = 3.4286 moles. So the volume that would contain this number of moles is going to be (3.4286 / 12.19) = 0.28126 litres or 281.26 ml.
What is the equivalence point of HCl and NaOH titration?
During the course of the titration, the titrant (NaOH) is added slowly to the unknown solution. As it is added, the HCl is slowly reacted away. The point at which exactly enough titrant (NaOH) has been added to react with all of the analyte (HCl) is called the equivalence point.
What volume must be added to reach the equivalence point?
You will need 6.516 mL of KOH to reach the equivalence point.