If you need ionic strength and you already have charge number of 1st ion, charge number of 10th ion, charge number of 2nd ion, charge number of 3rd ion, charge number of 4th ion, charge number of 5th ion, charge number of 6th ion, charge number of 7th ion, charge number of 8th ion, charge number of 9th ion, ionic concentration of 1st ion, ionic concentration of 10th ion, ionic concentration of 2nd ion, ionic concentration of 3rd ion, ionic concentration of 4th ion, ionic concentration of 5th ion, ionic concentration of 6th ion, ionic concentration of 7th ion, ionic concentration of 8th ion, ionic concentration of 9th ion and one way, this calculator does the substitution for you. It suits a quick check, a homework answer you want to confirm, or any figure you need to sanity test.
What Is the Ionic Strength Calculator?
The ionic strength calculator turns charge number of 1st ion, charge number of 10th ion, charge number of 2nd ion, charge number of 3rd ion, charge number of 4th ion, charge number of 5th ion, charge number of 6th ion, charge number of 7th ion, charge number of 8th ion, charge number of 9th ion, ionic concentration of 1st ion, ionic concentration of 10th ion, ionic concentration of 2nd ion, ionic concentration of 3rd ion, ionic concentration of 4th ion, ionic concentration of 5th ion, ionic concentration of 6th ion, ionic concentration of 7th ion, ionic concentration of 8th ion, ionic concentration of 9th ion and one way into ionic strength.
It is a quick way to get from the numbers you have to the number you need, without setting up a spreadsheet or reaching for a formula.
How the Ionic Strength Works
Each result follows from the ones before it, and the calculator shows every step, so a surprising answer can be traced back to the input that caused it.
Round your inputs to the precision you actually know, and keep more precision than that in the intermediate steps.
Getting a Result You Can Trust
Run the calculation twice with slightly different inputs. A sensible calculator moves its output in proportion; a wild change points to a unit or a decimal point problem in what you entered.
Write the inputs down next to the answer. It takes a moment and it is the difference between a number you can explain and one you cannot.
A Worked Example
Working through an example, with charge number of 1st ion set to 10, charge number of 10th ion set to 5, charge number of 2nd ion set to 2, the calculator returns ionic strength of 100, and ionic strength (ionic strength2) of 120, and ionic strength (ionic strength3) of 25,120. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out ionic strength?
Enter charge number of 1st ion, charge number of 10th ion, charge number of 2nd ion, charge number of 3rd ion, charge number of 4th ion, charge number of 5th ion, charge number of 6th ion, charge number of 7th ion, charge number of 8th ion, charge number of 9th ion, ionic concentration of 1st ion, ionic concentration of 10th ion, ionic concentration of 2nd ion, ionic concentration of 3rd ion, ionic concentration of 4th ion, ionic concentration of 5th ion, ionic concentration of 6th ion, ionic concentration of 7th ion, ionic concentration of 8th ion, ionic concentration of 9th ion and one way. The calculator then works through the relationship and reports ionic strength.
What does the ionic strength actually calculate?
It takes charge number of 1st ion, charge number of 10th ion, charge number of 2nd ion, charge number of 3rd ion, charge number of 4th ion, charge number of 5th ion, charge number of 6th ion, charge number of 7th ion, charge number of 8th ion, charge number of 9th ion, ionic concentration of 1st ion, ionic concentration of 10th ion, ionic concentration of 2nd ion, ionic concentration of 3rd ion, ionic concentration of 4th ion, ionic concentration of 5th ion, ionic concentration of 6th ion, ionic concentration of 7th ion, ionic concentration of 8th ion, ionic concentration of 9th ion and one way and converts them into ionic strength using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter charge number of 1st ion?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Do I have to fill in every field?
Only the fields a particular result depends on. If you leave one blank, the results that need it simply show a note instead of a number, and everything else still works.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.