How do u get the answer for this chemical equation??????? (1 Viewer)

[lillaila]

Calcium + Water ----> ????

Is it Calcium Hydroxide + Hydrogen gas ???

If so, is Calcium Hydroxide (aq) or (s) or ???

Thnx so much!!!

 

[xiao1985]

most hydroxide is non soluable.. so i suppose it would be (s)...

 

[CM_Tutor]

But calcium hydroxide is soluble - it is the limewater that you use in testing for CO₂.

The equation is:

Word Equation: calcium metal + water ---> calcium hydroxide solution + hydrogen gas

Neutral Species Equation: Ca_(s) + 2H₂O_(l) ---> Ca(OH)_{2 (aq)} + H_{2 (g)}

Net Ionic Equation: Ca_(s) + 2H₂O_(l) ---> Ca²⁺_(aq) + 2OH^-_(aq) + H_{2 (g)}

 

[xiao1985]

Originally posted by CM_Tutor
But calcium hydroxide is soluble - it is the limewater that you use in testing for CO2.

ops... some one didn't remember his table of ppt .. =p blehz

 

[t-i-m-m-y]

try it in the lab and see what u get

 

[abdooooo!!!]

Originally posted by CM_Tutor
Word Equation: calcium metal + water ---> calcium hydroxide solution + hydrogen gas

normally you use calcium oxide instead of the pure element... seems pointless to purify it and use it to make the same product.

 

[t-i-m-m-y]

lol just use sodium metal; u'll get an idea of wat happens

 

[Xayma]

Or get some Cs and you will have a more illustrated example, or try K also. About 55 moles worth should do.

 

[Affinity]

You can get some solid calcium hydroxide if you have too much calcium

 

[xiao1985]

Originally posted by t-i-m-m-y
lol just use sodium metal; u'll get an idea of wat happens

y that will be very uhm... spendid fire works and visual, n audio surrounding sound sensations ... n prolly glassware flying everywhere... remmeber to puto n ur goggles ^^

 

[Xayma]

Stuff goggles, I will put on a closed circuit camera, and watch as the rest of the people in my class try it (of course with a sutiable amount like 2kg)

 

[CM_Tutor]

Originally posted by Xayma
Stuff goggles, I will put on a closed circuit camera, and watch as the rest of the people in my class try it (of course with a sutiable amount like 2kg)

For some reason, the Department of Education frowns on this sort of activity...

 

[spice girl]

just throw chunks of K into the river. that's a safe alternative.

 

[CM_Tutor]

Not if you're a fish in that river

 

[Xayma]

The problem being if you have large enough chuncks is that it will spit back at you as the H₂ gas builds up infront of it.

 

[spice girl]

Originally posted by CM_Tutor
Not if you're a fish in that river

if its a river big enough for fish to live in, i'm sure it won't matter.

 

[xiao1985]

Originally posted by spice girl
if its a river big enough for fish to live in, i'm sure it won't matter.

uhm... wut if the 2kg K landed right on top of the fish?? =p blehz

 

[spice girl]

Originally posted by xiao1985
uhm... wut if the 2kg K landed right on top of the fish?? =p blehz

wot's the probability of that happening?

 

[CM_Tutor]

Originally posted by spice girl
wot's the probability of that happening?

If you were the fish, would you care?

 

[xiao1985]

Originally posted by spice girl
wot's the probability of that happening?

Originally posted by CM_Tutor
If you were the fish, would you care?

rofl lolz... funnie =)