ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: almostdonewithschooling on January 13, 2018, 10:37:17 pm

Title: Single displacement
Post by: almostdonewithschooling on January 13, 2018, 10:37:17 pm
Hey guys,

Just wondering,

Is this right?

Aluminium metal reacts with aqueous copper (II) nitrate

Would be:

Al(s) + Cu(NO3)2(aq) ---> Al(NO3)2 + Cu(s) when you balance it?


Thankss
Title: Re: Single displacement
Post by: Yertle the Turtle on January 13, 2018, 11:22:26 pm
Hey guys,

Just wondering,

Is this right?

Aluminium metal reacts with aqueous copper (II) nitrate

Would be:

Al(s) + Cu(NO3)2(aq) ---> Al(NO3)2 + Cu(s) when you balance it?


Thankss
Aluminum makes a 3+ ion, so it will be Al(NO3)3 instead. Therefore the balancing will be different:
2Al(s) + 3Cu(No3)2(aq) → 2Al(No3)3(aq) + 3Cu(s)
Title: Single displacement
Post by: almostdonewithschooling on January 13, 2018, 11:54:42 pm
Haha oopsy. Could you also tell me why the right side state is in (s) and (aq)?

Doesn't make sense because the Ba is a metal and SO is a non-metal. (S) is meant to be metal and metallic right?

(http://uploads.tapatalk-cdn.com/20180113/23b1b1f1c604003083d5cdc771c2d353.jpg)
Title: Re: Single displacement
Post by: Lear on January 14, 2018, 12:04:25 am
Solubility rules :) sulfates are insoluble with barium
Title: Re: Single displacement
Post by: Yertle the Turtle on January 14, 2018, 12:14:32 am
Haha oopsy. Could you also tell me why the right side state is in (s) and (aq)?

Doesn't make sense because the Ba is a metal and SO is a non-metal. (S) is meant to be metal and metallic right?

(http://uploads.tapatalk-cdn.com/20180113/23b1b1f1c604003083d5cdc771c2d353.jpg)
Don't think of it as the (S) being by itself, think of it as being a sulfate ion, and therefore when it is part of an ionic compound with a metal it can be solid or aqueous, and here is where you use your solubility laws to find out if it is soluble or insoluble. Just a side point, this formula is incorrect, as it hasn't been balanced. I don't know if that occurs later in the video or not, but just remember this anyway. Always balance :P