# Calculation Molar of HCL 37%

• violeta
In summary, The speaker has 1 bottle of HCL 37% concentration with 2.5L volume and wants to know how to calculate the molarity of the HCL in the bottle in order to prepare 1M. They mention that there is no density or molarity given on the label and suggest looking for the specific gravity in a handbook. They also give a reminder not to pipet by mouth and to use a pipet bulb and fume hood when working with the HCL solution.

#### violeta

I have 1 bottle of HCL 37% Concentration with 2.5L Volume. Given the MW is 36.46g/mol. How to calculate the molarity of the HCL in the bottle? as i only need to prepare 1M of HCL?

no density and molarity given in d label

Was that 1 MOLAR or 1 MOLAL concentration that you wanted to prepare? In case you wanted MOLAR, then you need the density or specific gravity of the HCl 37% solution. Are you permitted to look for this value in a table of values, like in a handbook?

What kind of label do you have? A professional, commercial label from a company? No matter... you can simply look for 37% HCl in a handbook to find the specific gravity of this concentration. I'm assuming that this is a laboratory task and not a question-for-credit task.

One more thing: since you had to ask your particular question, and it may be a practical question, DO NOT PIPET BY MOUTH. USE A PIPET BULB. In case you already know this, then please excuse this instruction, since you would use a bulb anyway.

symbolipoint said:
One more thing: since you had to ask your particular question, and it may be a practical question, DO NOT PIPET BY MOUTH. USE A PIPET BULB. In case you already know this, then please excuse this instruction, since you would use a bulb anyway.

And use a fume hood. That is above the azeotropic concentration and has a lot HCl pressure

## 1. What is the molarity of HCL 37%?

The molarity of HCL 37% is approximately 12.1 M. This means that there are 12.1 moles of HCL per liter of solution.

## 2. How do you calculate the molarity of HCL 37%?

To calculate the molarity of HCL 37%, you need to know the concentration of the solution and the molar mass of HCL. Then, divide the concentration by the molar mass to get the molarity. In this case, it would be (37 g HCL / 36.46 g/mol HCL) = 1.013 mol/L. However, it is important to note that the exact molarity may vary slightly depending on the specific concentration and molar mass values used.

## 3. What is the difference between concentration and molarity?

Concentration refers to the amount of a substance in a given volume of solution, while molarity specifically refers to the number of moles of a substance per liter of solution. In other words, concentration is a general term that can refer to any unit of measurement, while molarity is a specific unit of measurement for the number of moles per liter.

## 4. How does the concentration of HCL 37% compare to other concentrations of HCL?

HCL 37% is a relatively high concentration of HCL compared to other concentrations. For example, a commonly used laboratory concentration of HCL is 6 M, which is much lower than 37%. It is important to handle high concentrations of HCL with caution, as it can be corrosive and potentially hazardous.

## 5. Can the molarity of HCL 37% change over time?

Theoretically, the molarity of HCL 37% should remain constant as long as the amount of HCL and the volume of solution do not change. However, in practice, the molarity may change slightly due to factors such as evaporation or chemical reactions with other substances in the solution. It is important to regularly check and adjust the molarity of a solution to ensure accuracy in experiments and procedures.