How many grams of solute are needed to make 37.5 ml of 0.750 m ki solution? round to three significant digits.

4.648 gm of solute is needed to make 37.5 mL of 0.750 M KI solution.

Solution:  

We will start with the Molarity  

Also we know 1000 ml = 1 L

Therefore 37.5 ml by 1000ml we obtained 0.0375L  

Equation for solving mole of solute

Now, multiply 0.750M by 0.0375

Substitute the known values in the above equation we get

Also we know that Molar mass of KI is 166 g/mol

So divide the molar mass value to get the no of grams.

So 4.648 gm of Solute is required for make 37.5 mL of 0.750 M KI solution.