Chem questions

[Kenny Pollock 10+ year member]

Not sure how to do these, guidance is appreciated!

Charge for the ion of oxygen =

+1

+2

-1

-2

Charge for the ion of calcium =

+1

+2

-1

-2

Looking for how to do these...

Click to read more...

 

[swimfreak26 10+ year member]

You've got to be more specific than that...

Oxygen, as a diatomic molecule can have a net charge of 0, or -1 for instance (superoxide). The oxidation state, which I assume you're talking about is - in general - -2 for O in a molecule. This too, can change though depending on if it's a terminal oxygen, and what else it's attached to (though it's ox. state is ALMOST always 2-).

Calcium is a little simpler, as it's most readily formed cation and oxidation state are the same (2+). With that said, there are, too, situations where that's not the case. It's a pretty safe bet on calcium though.

 

[wave100205]

Oxygen is -2 and Calcium is +2. Not sure what else you were asking for but those are the answers

 

[swimfreak26 10+ year member]

Oxygen is -2 and Calcium is +2. Not sure what else you were asking for but those are the answers

Oxidation state is almost always -2...charge is completely different, and although I agree that it's probably the case here (as he mis-took it too), it's not that simple.

 

[Kenny Pollock 10+ year member]

This is basic 11th grade chemistry, nothing too hard. Thanks guys.. wave, I wanted the answers, just wanted to know how to solve for myself for future reference. This online class teaches me nothing.

 

[Kenny Pollock 10+ year member]

NEXT!

How do I solve this?

Charge on sodium in the pic below, formation of sodium carbonate?

+3

+2

-2

+1

-1

 

[jacka 10+ year member]

+1

 

[swimfreak26 10+ year member]

quit posting the questions 1-by-1 from your test mate...pathetic. Just think a little bit.

 

[Bloodstalker999 10+ year member]

+1

I am pretty sure he is right

 

[Kenny Pollock 10+ year member]

Ah, simple enough, I plugged the answer in and figured out how you got that. Thank you.

I don't understand how I'm supposed to know this?

An ionic bond between metals and oxygen produces

a hydride.

a bromide.

a chloride.

a metal oxide.

a phosphide.

 

[Kenny Pollock 10+ year member]

quit posting the questions 1-by-1 from your test mate...pathetic. Just think a little bit.

Think a little? I'm asking for help, not even asking for the answers. Help me figure them out, give me guidance, my online class isn't teaching me how to do this.

 

[Kenny Pollock 10+ year member]

BTW I still have a few questions RE: figuring out the ion charge, I'd like to know how to solve them myself...

 

[Bloodstalker999 10+ year member]

quit posting the questions 1-by-1 from your test mate...pathetic. Just think a little bit.

Don't be mad because he thought of it first //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[swimfreak26 10+ year member]

Think a little? I'm asking for help, not even asking for the answers. Help me figure them out, give me guidance, my online class isn't teaching me how to do this.

Look at the last question you posted please. A metal bonded to Oxygen...and your answers have: hydride (H-), chloride (Cl-), Bromide (Br-), and Phosphide (P 2-) as choices...all of which are non-metals, and non-oxygen. It only leaves a single choice even if you don't have much of a clue as to what the material covered by the question.

 

[swimfreak26 10+ year member]

Don't be mad because he thought of it first

Not mad because he "thought of it," angry because like most people he's not willing to think his way through something. Like many members of the forum, I've kicked my *** through college (and a shit load of chemistry to boot), earning my grade.