How to determine molarity in simple way?
Answers
Hey buddy here is your answer--
Molarity describes the relationship between moles of a solute and the volume of a solution.[1] To calculate molarity, you can start with moles and volume, mass and volume, or moles and milliliters. Plugging these variables into the basic formula for calculating molarity will give you the correct answer.
Method One of Four:
Calculating Molarity with Moles and Volume
1
Know the basic formula for calculating molarity. Molarity is equal to the number of moles of a solute divided by the volume of the solution in liters.[2] As such, it is written as: molarity = moles of solute / liters of solution
Example problem: What is the molarity of a solution containing 0.75 mol NaCl in 4.2 liters?
2
Examine the problem. Finding molarity demands that you have the number of moles and the number of liters. If the problem provides each of these figures, no preliminary calculations are needed.
Example problem:
Moles = 0.75 mol NaCl
Volume = 4.2 L
3
Divide the number of moles by the number of liters. The resulting quotient will give you the number of moles per liter of solution, otherwise known as molarity.
Example problem: molarity = moles of solute / liters of solution = 0.75 mol / 4.2 L = 0.17857142
4
Write your answer. Round off the number of digits after the decimal point to two or three, depending on your instructor's preference. When you write out the answer, abbreviate "molarity" with "M" and state the chemical abbreviation of the solute involved.
Example problem: 0.179 M NaCl