Question

Please someone actually explain this to me?!
*Write out the balanced equation for the reaction that occurs when Ca and Al(NO3)3 react together.*
Everyone will give you the answer, but I don't understand how they got it!

Answer 1

@dan815 @radar

Answer 2

you have to look at the period table

Answer 3

see how many valence electrons calcium has

Answer 4

Okay, Ca has 2.

Answer 5

Ca + Al(NO3)3 -->

Answer 6

Ca+Al(NO3)3-->Ca(NO3)2+Al
Write down the number of atoms that you have on each side of the equation
On the reactant side: Ca:1 Al:1 N:3 O:9
On the product side: Ca:1 Al:1 N:2 O:6
Add a coefficient of 3 to Ca(NO3)^2
Ca+Al(NO3)3-->3Ca(NO3)2+Al
On the reactant side: Ca:1 Al:1 N:3 O:9
On the product side: Ca:3 Al:1 N:6 O:18
Now add a coefficient of 2 to Al(NO3)2 and balance it by adding 2 Al on the product side and a 3 on the reactant side
3Ca+2Al(NO3)3-->3Ca(NO3)2+2Al
On the reactant side: Ca:3 Al:2 N:6 O:18
On the product side: Ca:3 Al:2 N:6 O:18

Answer 7

Awesome job @Abmon98 !!

Answer 8

Where the heck did the little 2 come from?? I don't get how you came up with the side after the -->

Answer 9

Thank you @Somy :)

Answer 10

you dont understand formation of product or balancing? @This_Is_Batman

Answer 11

I can balance when both sides are there, but not like this, no..

Answer 12

so you basically do not know which kind of product to expect

Answer 13

Nope..

Answer 14

Ca + Al(NO3)3 --->
well look
before reacting, compounds tend to break down to anions and cations
in case of Ca is element with 0 oxidation state so stays as it is
but Al(NO3)3 breaks into
Al (+3 oxidation state) and 3 of NO3 (-1 oxidation state of each)

this is single replacement reaction
so Ca as a metal that can form +2 oxidation state takes opposite charge- meaning NO3 and thus Al now is left alone

Answer 15

sothe product will be CaNO3
Ca +2 oxidation state
NO3 -1 oxidation state
so