Okay, uhm, hi? In an awkward attempt to not break the rules, I'll just give some background info; what I've tried, why I think I'm having problems, and so forth. If you just want to know what the questions themselves are, then, I suppose you could just read the bottom? Sorry if it seems too much, I do tend to ramble, I just don't want to be breaking any rules and it might help me figure out why it's so hard for me.
Anyway, I'm doing the Chemical Equations and Reactions section in my school, and for some reason, I'm just not getting it. I understand many of the rules, but these things don't 'click' with me. It's probably because I'm so shakey with the stuff we learned at the beginning and because I tend to overthink and from there, I commit academic suicide. Valences, electron configuration, figuring out how to actually make those chemicals, chemical names...all of those are a jumble to me, so I apologize if I seem idiotic. It's true that I'm fairly slow, and most of this will probably seem like first grade math, but...I just have...problems, I guess. I don't understand anything unless it's pretty much screaming the answer at me. ...Even when it does that, I sometimes can't get it.
Most of my "work" will just be mostly my thought process, the things I thought as I tried to figure out the problems. Even if you can't help, or would rather I thought it out myself, I would really appreciate it if someone told me what was wrong with the thought process itself and then walk me slowly to the answer.
I know there are a lot of questions and I really do apologize. I really don't need them all answered at once because some of them, I sort of know what the answer is, but it feels wrong or despite getting an answer, I don't think I did it right. I would really be happy if I just got a nudge in the right direction, even. I hope this isn't terribly against the rules. There's just this iffy grey area when it comes to chemistry for me, which makes it so hard to ask my teacher...especially since I feel like my questions are redundant. And, uhm, anyway, I really appreciate any kind of help that anybody can give me.
Uhm, yeah, my questions...here they are:
1. Very active metals will react with water to release hydrogen gas.
a. Complete and then balance the question for the reaction of Ca(s) with water.
Ca(s) + H2O(l) ----> H2 + Ca202
Okay, here? I freeze. Ca202 does not look right. I've never seen this before. I'm pretty sure there's H2 somewhere because it says so in the very problem.
But if I were to assume it was right, then...I would balance, I think. So...just making that assumption, then:
2Ca(s) + 2H2O(l) ----> 2H2 + Ca202
Is that it...?
b. The reaction of rubidium, Rb, with water is faster and more violent than the reaction of Na with water. Account for this difference in terms of the two metals' atomic structure and radius.
...I don't even know.
I would guess that it has something to do with the number of electrons in the outer shell of Rubidium in comparison to the number of elections in the outer shell of Sodium and their willingness to share with water. That's about as far as my brain got before I realized it had nothing to do with atomic structure and radius...
2. Gold is often used in jewelry. How does the relative activity of Au relate to its use in jewelry?
...What does relative activity have to do with anything? How easily it undergoes chemical reactions?
Uhm, going with the stupidest, almost sarcastic answer of them all, Gold is used in jewelry because not only is it shiny, it is practically unreactive, so people use it in jewelry because they would prefer not to have something hanging around their neck that would explode or burn their skin off or something of the like.
3. Explain how to use an activity series to predict certain types of chemical behaviour.
It seems like it would be so obvious, yet I can't help but think there's something I'm missing. The activity series tells how easily an element reacts in chemical reactions, so...using the activity series, you can figure out if chemical equations actually yield a product or not...?
That's pretty much as far as I got before I though that there was no way...
4. Aluminum is above copper in the activity series. Will aluminum metal react with copper(II)nitrate, Cu(NO3)2, to form aluminum nitrate, Al(NO3)3? If so, write the balanced equation for the reaction.
Al(s) + Cu(NO3)2 ----> Al(NO3)3 ?
This would be no, wouldn't it? Because the copper just...disappears? And if it disappears, it doesn't follow the law of conservation of mass, does it?
Those were problems in my homework, and for the life of me, I can't get my brain to comprehend them no matter how much I try. Now these are actually questions having to do with balancing equations. They're from an extra credit packet which I also don't understand. I mean, I get all the rules, don't get me wrong, my brain simply can't wrap itself around the idea of doing these equations.
I apologize again for the questions, the quantity of them at least.
Anyway, more questions:
1. SO2 + H2O ----> ?
Okay, so in my packet, it says it's supposed to be synthesis, which means that those two are supposed to come together to form one substance. But then, that means the H and the O and the S have to all make their way to the other side of the equation.
SO2 + H2O ----> HSO4
...I'm not sure which one would work, though. I vaguely remember that there existed an H2SO3 or...something. Which one are we supposed to pick? And then there's the issue with giving it a name. The product, I mean. (I'm trying to figure this out without a lot of help from my book, as to mimic what a test would be like so...) Hydrogen...sulfate, I would think it was.
Anyway, now, I would think I should balance.
2SO2 + H2O ----> 2HSO4
...Would that be right? Now, here's a snag that I came up against. In addition to this, there was another equation which was like this: SO3 + H2O ----> ?
So...my question here would be, would it be the same answer? Would the balancing just be a little bit different? Or what?
2. Hg2CO3 ----> Hg + HgO + ____
...Nothing. I have nothing. Honestly, with these kinds of equations I draw blanks. Complete and total blanks, if there was anything I needed help with, it would probably be problems such as these. I'm not sure if I fear it, or if it's just far too hard for me.
3. Zn + H2SO4 ----> ___ + ___
I'm just guessing. I know about...as much as I did in the above problem. I'm clueless, but as usual, I'm going to guess it.
Zn + H2SO4 ----> Zn(OH)2 + S
...I don't know how I'm supposed to have gotten this. The one element on the right, I know, is supposed to replace one of the elements in the compound and push another out...so I just assumed.
I've never quite figured out the rule with OH, or things like that. When you balance it, I mean.
But still, I don't even think it's right. Not at all.
Pb(NO3)2 + HI ----> ?
Pb(NO3)2 + HI ----> I(NO3) + PbH4
I have no clue how I got this. I know one is supposed to replace another depending on its place in the activity series, but...I don't know. There's no lead, no iodine, or anything. I think I'm confusing one thing with another. And then I know there are rules about how one of them, in a double replacement reaction, has to be at least a gas, water, or a precipitate.
I think this is really the basics of what I don't get. I'm sorry, I know that there is so much, and I'm asking a lot. Nobody really needs to answer them all, I just need a basic idea...some help...stuff like that. I'd really appreciate it.