<p>Hey guys, so the AP Chem exam is coming up ~</p>
<p>I keep having trouble writing reaction predictions, namely number 4 on all the free responses.
I dont know when to have a net ionic equation, or when to use double replacement, or when to combine reactants to form a single product - any suggestions? Any useful worksheets, websites, etc?</p>
<p>Thanks very much for the advice - it's only a few days before the exam, and I AM FREAKING OUT. Our teacher did not mention ANYTHING about this.... :(</p>
<p>I was just about to make a new thread asking the same question when I saw this. Any advice would be appreciated!</p>
<p>[Reaction</a> Notes: AP Chemistry](<a href=“http://www.roomd113.com/reaction%20notes.htm]Reaction”>http://www.roomd113.com/reaction%20notes.htm)</p>
<p>That helps.</p>
<p>Anyway, all you really need to know is:
- If you see two solutions being mixed together it is usually a precipitation reaction, or could be a redox in some situations
- If you see a metal cation and some form of a ligand (NH3, CL-, CN-, etc.) it is a complex ion formation
- If you see one chemical by it self it is usually a single replacement (redox)
- If you put something that has an oxygen but a non-metal attached it (e.g. SO2) in water it will produce an acid. So just remember, non-metal oxide in water produces an acid
- Similarly, a metal-oxide in water will produce a base
- Obviously look for Strong Acid- Strong base reactions, weak acid - Strong base reactions, and strong acid- weak base<br>
- If you put a piece of metal in water it will produce hydrogen gas and a base
- A metal hydride (like CaH2) in water will produce hydrogen gas and a base
- Look out for decomp reactions when ever you have 1 chemical and you heat it
- Combustion reactions are quite simple just remember the organic names, usually these are phrased like “ethanol is burned in air” or something like that</p>
<p>Remember that carbonic acid in water produces carbon dioxide and water and sulfurous acid in water produces sulfur dioxide and water </p>
<p>Well that’s all I remember, feel free to add more/correct anything that’s incorrect</p>
<p>also make sure to review your solubility rules, they can help a good amount on these types of questions</p>
<p>Whoa thanks guys! The website is also extremely helpful XD
Now time to get down to practice multiple choice argghgh</p>
<p>What sucks if that i’m a senior taking ap chem(so i cant slack off), but my MAJOR next year is gonna be chemistry! so i HAVE TO ACE IT</p>