A chemist reacted 0.05 moles of solid sodium with water to form sodium hydroxide solution. The chemical reaction for this is: Na+H2O = NaOH +H2 What mass of sodium was reacted?

1 Answer
anor277
Jul 8, 2017

Got a Periodic Table........?

#Na(s) + H_2O(l) rarr NaOH(aq) + 1/2H_2(g)uarr#

Explanation:

Sodium has an atomic mass of #22.99*g*mol^-1#. How do I know this? Well, for a start it is printed on the Periodic Table, a copy of which will be made available in every examination of chemistry and physics you sit........

And so we take the (dimensional) product..........

#22.99*g*cancel(mol^-1)xx0.05*cancel(mol)=??*g#, a bit over one gram...........

Typically, questions like these would also ask you to calculate the volume of dihydrogen gas evolved ......... Can you make this assessment?

Related questions
See all questions in Stoichiometry
Impact of this question
3626 views around the world
You can reuse this answer
Creative Commons License