How do we represent the combustion of hexanes? And how do we represent the formation of silver chloride from sodium chloride, and silver nitrate?

1 Answer
Nov 14, 2015

Please give your science teacher a break. She might be my colleague!

Explanation:

So, you have to balance 2 unspecified equations. I'll give you 2, which might or not be suitable. Firstly, combustion of hexane (the which drives your motor!):

C6H14(g)+192O2(g)6CO2(g)+7H2O(g)

Is this balanced? And remember that I might be trying to bust your balls because you offered disrespect to your science teacher.

Secondly, precipitation of an insoluble precipitate, say silver chloride:

AgNO3(aq)+NaCl(aq)AgCl(s)+NaNO3(aq) We could write the net ionic ionic equation for this as:

Ag++ClAgCl(s) Should you do this reactionyou would observe the prepcipitate (the deposit) of a curdy white precipitate of AgCl.

Both reaction demonstrate stoichiometry; that is for every reactant particle there must be a corresponding product particle. You also practise stoichiometry whenever you make a purchase with cash or make an electronic transaction: for every credit there must be a corresponding debit.