1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound? Give your answer with four decimal places.

Question

1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound? Give your answer with four decimal places.

2) You are going to make 300ml of a 75mM solution using a compound whose MW=818 g/mole. How many grams do you need of this compound? Give your answer with two decimal places.

3) You are going to make 100ml of a 6.60mM solution using a compound whose MW=500 g/mole. How many grams do you need of this compound? Give your answer with two decimal places.

Please show work so I can do the rest of the questions on my own.

Thank you!

Answer 1

To calculate the number of grams needed to make a solution, you can use the following formula:

Mass (g) = Volume (L) x Concentration (mol/L) x Molecular Weight (g/mol)

Let's break down the questions one by one:

1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound?

First, we need to convert the concentration from micromolar (uM) to molar (M). To do this, divide the given concentration by 1000.
25 uM = 25/1000 = 0.025 mM

Now, we can substitute the values into the formula:

Mass (g) = Volume (L) x Concentration (mol/L) x Molecular Weight (g/mol)
Mass (g) = 1.800 L x 0.025 mol/L x 60.06 g/mol

Calculate the right side of the equation:
Mass (g) = 0.04515 g

Therefore, you need 0.04515 grams of the compound to make a 1800ml solution with a concentration of 25uM.

2) You are going to make 300ml of a 75mM solution using a compound whose MW=818 g/mole. How many grams do you need of this compound?

We can directly use the formula:

Mass (g) = Volume (L) x Concentration (mol/L) x Molecular Weight (g/mol)
Mass (g) = 0.300 L x 75 mol/L x 818 g/mol

Calculate the right side of the equation:
Mass (g) = 184.5 g

Therefore, you need 184.5 grams of the compound to make a 300ml solution with a concentration of 75mM.

3) You are going to make 100ml of a 6.60mM solution using a compound whose MW=500 g/mole. How many grams do you need of this compound?

Again, we can directly use the formula:

Mass (g) = Volume (L) x Concentration (mol/L) x Molecular Weight (g/mol)
Mass (g) = 0.100 L x 6.60 mol/L x 500 g/mol

Calculate the right side of the equation:
Mass (g) = 33.0 g

Therefore, you need 33.0 grams of the compound to make a 100ml solution with a concentration of 6.60mM.

Remember to use the formula Mass (g) = Volume (L) x Concentration (mol/L) x Molecular Weight (g/mol) to solve similar calculations for other questions.