[Ace888]

Hello people,
I've never touched science since grade 12.. and now Im at uni .. and one of my units is Chemistry.. (annoying) and since Im a beginner to this.. I have no idea how to do it.. so someone please help me out and explain why thank you..

Q: Would you expect precipitates to form if solutions containing the following ions are mixed? If so provide the formula for the precipitate.
a) I- and Ag+
b) Ba 2+ and OH-
c) sulfate and strontium ions

Q2:Provide the molecular equations and identify the oxidation numbers of all atoms for the reaction of Mg and O2.

Q3: No indicator is required in order to detect the end point in a titration of permanganate with hydrogen peroxide. Why?

Q4: What is the difference between the end point and the equivalence point of a titration?


Those are the 4 questions that I found hard to answer.. I will try help myself out with other questions from the textbook.. but I just couldnt find the answers to these. Please help me out! Thank you

[AWK]

Read carefully your textbook or
1. search internet for solubility rules and solubility product
2. search internet for oxidation numbers
3. search internet for color of permanganate and manganese(II) compounds
4. read this link: http://wiki.answers.com/Q/How_does_the_equivalence_point_of_a_titration_differ_from_its_end_point

[Ace888]

Honestly.. I just can't find them on the net.. or the book..
Please help me out here!

[Borek]

Honestly, I don't believe you. Googling for solubility rules gives more pages on the subject that you will ever need to read.

[Ace888]

Ok.. can you try help me find Sulfate and strontium..
If it takes 2 minutes of your day.. Im sorry..

[Borek]

Strontium is an alkaline earth metal, they all share the same characteristics when it comes to sulfates solubility.