Question 1

A solution is made by dissolving 0.565 g of potassium nitrate in enough water to make up 250. mL of solution. What is the molarity of this solution?

Please explain and show work.

Question 2

$\: \: \: \: \: \: \: \: \:$

A solution is made by dissolving 0.565 g of potassium nitrate in enough water to make-example-1

Question 3

Molar mass of Potassium Nitrate:-

$\\ \large\sf\longmapsto KNO_3$

$\\ \large\sf\longmapsto 39u+14u+3(16u)$

$\\ \large\sf\longmapsto 53u+48u$

$\\ \large\sf\longmapsto 101u$

$\\ \large\sf\longmapsto 101g/mol$

Now

$\boxed{\sf No\:of\:moles=(Given\:mass)/(Molar\:mass)}$

$\\ \large\sf\longmapsto No\:of\:moles=(0.565)/(101)$

$\\ \large\sf\longmapsto No\:of\:moles=0.005mol$

We know

$\boxed{\sf Molarity=(Moles\:of\:solute)/(Vol\:of\:Solution\:in\:L)}$

$\\ \large\sf\longmapsto Molarity=(0.005)/((250)/(1000)L)$

$\\ \large\sf\longmapsto Molarity=(0.005)/(0.250)$

$\\ \large\sf\longmapsto Molarity=0.02M$

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

2 Answers

0 Comments

Please log in or register to add a comment.

Molar mass of Potassium Nitrate:-

0 Comments

Please log in or register to add a comment.

Other Questions