The product of CaCl2 and H2O? I need help determining the product of dissolving CaCl2 in H20. So, what is the product?? The answer I got sounded really weird and wrong :/. Please help! Thanks :D

By: Guest
Date: Thu-Jul-28-2011-

Answer 1

For each mole of CaCl2 you dissolve in water you get one mole of Ca2+ ions and 2 moles of Cl- ions. It is really quite simple.

Answer 2

What do you get when you dissolve CaCl2 in water? Wet calcium chloride.

CaCl2 is soluble in water and dissociates to form Ca2+ and Cl- ions. And no, nothing happens to water, because neither Ca2+ nor Cl- ions hydrolyze (react with water).

That's because Ca is the cation of a strong base, and Cl is the anion of a strong acid.

The only thing that water will do is form a hydration sphere around each of the two ions in solution. But, that isn't a chemical change in the water.

======== Follow up =========

Your first answer on YA, and it needs a little work. I hate to be the first to find fault with your answer, but ...

"Ca2O and HCl

that is Calcium oxide and hydrochloric acid "

... won't happen.

You won't get CaO and HCl. That's because CaCl2 and water don't react with each other. But guess what.

CaO and HCl would react. It would be an "acid/base" reaction where CaO behaves as a base because it is the basic anhydride of Ca(OH)2. You know what else?

CaO + 2HCl --> CaCl2 + H2O

Yep, your products would actually react to make what you started with. Therefore, there is no reaction between CaCl2 and H2O.

But don't let this deter you from answering other questions. This forum is all about learning about chemistry. We all learn from those who participate. So don't worry that you didn't get this one right, I may have a bit of head-start, since I've been doing and teaching chemistry for over 40 years.

Answer 3

hehe.. this questio will be the first that i will answer

CaCl2 + H2O

that is the reaction between Calcium Chloride and water..

the reaction is called double displacement..

there will be an exchange of partners..

Ca2O and HCl

that is Calcium oxide and hydrochloric acid

please check the valence number.. i already forget

but as far as i can remember, im right..

Answer 4

In achedemic chemical terms:

CaCl2(s) + H2O(l) -> Ca(+2)(aq) + 2Cl(-)(aq) + H2O(l)

In working chemical terms:

CaCl2 + H2O -> CaCl2 + H2O

To make a long story short, nothing happens. The Calcium chloride crystals simply dissolve in water forming aqueous ions. There is no physical change except the density of the solution and its electrical conductivity, which is increased by the presence of the ions.

About teh wata (since you asked) ////////////////////////////

Water exists in equilibrium with its own ions, but unlike Calcium chloride, most of the water is in the form of its own molecules. Calcium chloride is entirely in the form of its own ions, unless the solution becomes saturated. Then there will be solid Calcium chloride crystals that can't dissolve.

Water forms the following ions:

2H2O <-> H3O(+) + OH(-)

The H3O(+) ion is known as a hydronium ion. The ratio of water ions to

water molecules is absolutely constant. This ratio is known as a dissassociation constant. It takes the form of:

Keq = [H3O(+)][OH(-)]/[H2O] = 1E-14

There are as many hydronium ions as hydroxyl ions (OH-), so the concentration of hydronium ions in neutral water is 1E-7. The pH is the -LOG of this concentration and -LOG(1E-7) = 7.00, which is why the pH of neutral water is 7.00.

Calcium ions don't react directly with water itself, but if CO2 is present, it sets up its own equilibrium. First, it forms something known as carbonic acid:

CO2 + H2O <-> H2CO3

Carbonic acid is then able to dissassociate in the following manner:

bicarbonate ions form

H2CO3 + H2O <-> H3O(+) + HCO3(-)

carbonate ions form

HCO3(-) + H2O <-> H3O(+) + CO3(-2)

These ions in turn can react with calcium ions in the following manner:

Formation of Calcium bicarbonate

Ca(+2) + 2HCO3(-) <-> Ca(HCO3)2

Formation of calcium carbonate

Ca(+2) + CO3(-2) -> CaCO3

///////////////// in summary

In absolutely pure water, the following molecules exist:

H2O, H3O(+),OH(-)

Exposed to the atmosphere, the following molecules exist:

H2O, H3O(+),OH(-), CO2, H2CO3, HCO3(-), CO3(-2)

When CaCl2 is added the following ions and molecules exist:

H2O, H3O(+),OH(-), CO2, H2CO3, HCO3(-),CO3(-2), Ca(+2),Cl(-), Ca(HCO3)2, CaCO3

/////////////////////////////// HOWEVER ////////////////////////////////////////...

When CaCl2 is added to pure water exposed to the atmosphere, 99.99% of the material will be either H2O, CaCl2, Ca(+2) or Cl(-).

///////////////////////////////// the end ////////////////////////////////////////...

FYI: Working chemists seldom use terms like "(l)" and "(aq)" but these terms are very prevalent in an achedemic setting. I suppose they are sort of like "training wheels" on a bicycle.

[d] By: Guest
Date: Unknown---
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