x Turn on thread page Beta
 You are Here: Home >< Pharmacy

# Basic calculations in pharmacy help? watch

1. 1) How much 80% (v/v) glycerol would need to be added to distilled water to produce 25ml of a final concentration of 100mM?

2) What is the molarity of a 3% (w/v) solution of NaCl?

3) You have been given 0.3M solution of NaCl. How much should be added to distilled water to produce 2.5ml of a final concentraion of 100mM?

Please can anyone help me with any of these calculations?
2. These arent hard. 3% means 3g in 100ml. Molarity is mol/L. Simply work out how many grams in 1L which is 30g. Now work out how many mol this is. Grams = mol x molecular weight. So grams divide by molecular weight = mol.
Work out the molecular weight of NaCl to solve.

You need the book called 'MCQs in pharmacy calculations.' The ebook is on ebay for a few quid.

Are you just starting pharmacy or applying, as you need to learn this stuff. Its vital for the job.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 29, 2015
Today on TSR

### Complete university guide 2019 rankings

Find out the top ten here

### Can I go to freshers even if I'm not at uni?

Poll
Useful resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE