Chemistry Forum

This and similar chemical equations can be resolved by the following steps: 1. Q: Is any of the atoms change oxidative state? If yes - follow the electrons to make sure equal number of electrons transferred from reducer to oxidizer. If no - the task is more simple. Basically the number of the same i...

This is question from physics not chemistry, but I'll give you a clue. You need to know the speed of light.

Chandan UG wrote:i have searched web and some books too.., i need more then what web can give.....

Then you need to go beyond this forum.

So, they speculate that based on experiments with mice phosphoric acid reduces digestion of calcium which is important for development of fetus. My take on this is that any harm from a tiny amount of phosphoric acid in a Pepsi drink is negligible compare to other harmful ingredients like caffeine.

Apparently Ion-Solid Int e raction? Here is a link on a related paper: http://www.scielo.br/pdf/%0D/bjp/v35n3b/a03v353b.pdf Also, there is a brief explanation: "Physical processes resulting from the collision of energetic ions, atoms, or molecules with condensed matter. " http://www.answer...

Phosphoric acid ... is very dangerous for health, especially for Pregnant ladies, this can make the child mentally disabled. I doubt that it's true. Most likely a myth. "Animal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have be...

You are welcome. There are many compounds with C6H8O6 formula. In these situations use Google to find the ones that make sense.

C6H8O6 is apparently ascorbic acid[/url]

Now check out this link http://www.coursework.info/GCSE/Chemist ... 61004.html

This one is tricky.
1. Calculate mol (g-atom) amount of carbon (11.2/12)
2. Calculate mol amount of O2 (19.63/22.4)
3. Find the amount of CO2 if the rest is CO
4. Calculate the amount of Na2CO3
5. Calculate concentrations

Apparetntly correct task is "20 ml of a solution containing 0.1 gram of impure sample of H2O2 (in water) was oxidized by 0.108 gram of KMnO4"
Do you know the reaction of H2O2 and KMnO4?

OK, another clue: in acid Mn7+ ---> Mn2+
hydrogen peroxide oxidizes into water

Start by reading your chemistry book.

All reactions make sense.
I'll give you a clue. Make sure you understand that Mn3O4 is a mixed oxide (MnOxMn2O3). While Mn2+ in MnO is the same as in MnSO4, the only source of oxidizer to make Mn2O3 is sulfer (S6+) --> S4+ (SO2)

Now look further at oxidation of FeSO4 by Mn2O3/H2SO4

300gx25/100 + 400gx40/100 = total amount of dissolved compound
300g + 400 g = total amount of solution
Now calculate the concentration

This reaction can't go at room temperature and even less likely with KMnO4 aq. solution. Catalyst theoretically possible (Pd), but most likely it will initiate vigorous burning of propane in solid KMnO4. To come up with the reaction simply break it into two parts: 1. Thermodegradation of KMnO4 produ...

(NH4)2S2O8 -oxidizer and Na2SO3 - reducer