# What is molarity?

is the concentration of a solution expressed as the number of moles of solute per litre of solution.
To get the molarity, you divide the moles of solute by the litres of solution.
##”Molarity” = “moles of solute”/”litres of solution”##
For example, a 0.25 mol/L NaOH solution contains 0.25 mol of sodium hydroxide in every litre of solution.
To calculate the molarity of a solution, you need to know the number of moles of solute and the total volume of the solution.
To calculate molarity:
Calculate the number of moles of solute present.
Calculate the number of litres of solution present.
Divide the number of moles of solute by the number of litres of solution.
EXAMPLE:
What is the molarity of a solution prepared by dissolving 15.0 g of NaOH in enough water to make a total of 225 mL of solution?
Solution:
1 mol of NaOH has a mass of 40.00 g, so
##”Moles of NaOH” = 15.0 cancel(“g NaOH”) × “1 mol NaOH“/(40.00 cancel(“g NaOH”)) = “0.375 mol NaOH“##
##”Litres of solution” = 225 cancel(“mL soln”) × “1 L soln“/(1000 cancel(“mL soln”)) = “0.225 L soln”##
##”Molarity” = “moles of solute”/”litres of solution” = “0.375 mol”/”0.225 L” = “1.67 mol/L“##
Some students prefer to use a “molarity triangle”.
It summarizes the molarity formulas as
##”Moles” = “molarity × litres”##
##”Molarity” = “moles”/”litres”##
##”Litres” = “moles”/”molarity”##

Save Time On Research and Writing
Hire a Pro to Write You a 100% Plagiarism-Free Paper.
Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Homework Mules
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Education
Thank you so much, Reaserch writer. you are so helpfull. I appreciate all the hard works. See you.
Customer 452701, February 12th, 2023
Technology
Customer 452551, October 22nd, 2021
Psychology
I requested a revision and it was returned in less than 24 hours. Great job!
Customer 452467, November 15th, 2020
Political science
I like the way it is organized, summarizes the main point, and compare the two articles. Thank you!
Customer 452701, February 12th, 2023
Political science
Thank you!
Customer 452701, February 12th, 2023
Great paper thanks!
Customer 452543, January 23rd, 2023
Accounting
Thank you for your help. I made a few minor adjustments to the paper but overall it was good.
Customer 452591, November 11th, 2021
Finance
Thank you very much!! I should definitely pass my class now. I appreciate you!!
Customer 452591, June 18th, 2022
Psychology
Thank you. I will forward critique once I receive it.
Customer 452467, July 25th, 2020
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend