Physical states in chemical equations

Moderators: Chem_Mod, Chem_Admin

Yasmin Rizal 1C
Posts: 8
Joined: Wed Sep 21, 2016 2:59 pm

Physical states in chemical equations

Postby Yasmin Rizal 1C » Sun Oct 09, 2016 1:01 pm

When asked to write down the chemical equation for a reaction, is it necessary to know and write down the physical state of all reactants and products in the reaction? I.e. should I write
NH3 + O2 → NO + H2O
or
NH3 (g) + O2 (g) → NO (g) + H2O (g) ?

Megan Yabumoto 3K
Posts: 42
Joined: Fri Jul 22, 2016 3:00 am

Re: Physical states in chemical equations

Postby Megan Yabumoto 3K » Sun Oct 09, 2016 2:11 pm

Yes, it is necessary to keep track and write down the physical states of the reactants and products. This is especially necessary when applying these equations for precipitation reactions and other types of reactions where states are being changed.

Chem_Mod
Posts: 17828
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 406 times

Re: Physical states in chemical equations

Postby Chem_Mod » Sun Oct 09, 2016 2:22 pm

It's good practice to write the states as well


Return to “Balancing Chemical Reactions”

Who is online

Users browsing this forum: No registered users and 1 guest