About us | Feedback

Simple amount of product calculation

Balancing & stoichiometry questions

Balancing & stoichiometry lectures

Balancer and stoichiometry calculator

operating systems:
XP, Vista, 7, 8, 10

single user license price:
€24.95 - approximately $33

Buy Now!

By clicking Buy Now! you will continue to the FastSpring checkout page where payment will be taken, and your order fulfilled by FastSpring, our trusted reseller, and Merchant of Record.

download 30-day free trial!
30-day money back guarantee!

Balancing questions » amount of product

» Equation balancing and stoichiometry calculator.

Some people are obsessed about the idea of dropping metallic sodium into water. Assuming thumb sized lump weights 5.00 g, how much sodium hydroxide Jdurg added to the lake throwing three such sodium pieces?

This question looks boring easy. Let's start with the balanced equation and use ratios:

45.98 g:79.99 g
5.00 g:x g

Note that both 45.98 g and 79.99 g are masses of two moles of Na and NaOH respectively, as such are amounts of substances taking place in the reaction. So proportion is

45.98 g : 79.99 g = 5.00 g : x g

and x = 79.99/45.98×5.00 = 8.70 g

Ready? No! There were three pieces dropped into the lake, so the final answer is 26.1 g.

(try to do this question using EBAS).


Chemical calculator software for pH calculation, concentration conversion solution preparation and chemical equation balancing chemical calculator