Determine the molarity of HCL solution with the help of suppliedM/20naoh solution by titration method
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Ah, chemistry, where solutions turn into problems. Alright, let's titrate our way through this one. Here's what we'll do:
1. Measure out a known volume of the M/20 NaOH solution.
2. Take some HCl solution and add a few drops of a suitable indicator, maybe something like phenolphthalein.
3. Slowly add the NaOH solution to the HCl solution while swirling the mixture.
4. Keep adding the NaOH solution until we see a color change in the indicator.
5. Note the volume of M/20 NaOH solution required to neutralize the HCl solution.
Now, to determine the molarity of the HCl solution, we'll use the equation:
M1V1 = M2V2
Where:
M1 = molarity of NaOH solution (M/20)
V1 = volume of NaOH solution used (in liters)
M2 = molarity of HCl solution (what we're trying to find)
V2 = volume of HCl solution used (in liters)
So, gather your lab coat and goggles, and let's start titrating! Remember, in the world of chemistry, precision is key, but humor is just as important.
To determine the molarity of an HCl solution using the supplied M/20 NaOH solution by titration method, you need to follow these steps:
1. Prepare the M/20 NaOH Solution: Start by preparing the M/20 NaOH solution by dissolving the appropriate amount of NaOH in distilled water. The molarity of a M/20 solution means it is one-twentieth (1/20) the molarity of a normal solution. For example, if the normality of NaOH is 1 M, then the M/20 NaOH solution will have a molarity of 0.05 M.
2. Standardize the NaOH Solution: To accurately determine the molarity of the NaOH solution, you need to standardize it by performing a titration with a standardized acid solution. In this case, you will use the HCl solution whose molarity you are trying to determine.
a. Take a known volume (e.g., 25 ml) of the HCl solution into a conical flask using a pipette.
b. Place a few drops of an appropriate indicator, such as phenolphthalein, into the flask.
c. Slowly add the M/20 NaOH solution from a burette to the HCl solution until the color of the indicator changes. The color change indicates that the acid has been neutralized.
d. Note the volume of the M/20 NaOH solution that has been consumed.
3. Calculate the Molarity of HCl Solution: Now, using the volume of M/20 NaOH solution consumed and its known molarity, you can calculate the molarity of the HCl solution.
The balanced chemical equation for the neutralization reaction between HCl and NaOH is:
HCl + NaOH → NaCl + H₂O
a. Use the balanced equation to determine the mole ratio between NaOH and HCl. In this case, it is 1:1, so the moles of NaOH consumed are equal to the moles of HCl in the given volume of the HCl solution.
b. Calculate the moles of NaOH consumed using the molarity and volume of NaOH solution used in the titration.
c. Since the moles of NaOH consumed are equal to the moles of HCl, you can calculate the molarity of HCl by dividing the moles of HCl by the volume (in liters) of HCl solution you used in the titration.
It's important to note that accurate and precise measurements, as well as proper techniques, are crucial for reliable results. Therefore, it is recommended to perform multiple trials and calculate the average molarity of HCl from those trials to obtain more accurate results.