So far...
Alkali metal + water = metal hydroxide + hydrogen
Ca (valency 2) O (valency 2) + H (valency 2) O
= Ca (OH) (valency 2) + H (valency 2)
I then canceled the valencies...
CaO + H (valency 2) O = Ca(OH) (valency 2) + H (valency 2)
However I am unable to blanance this, what is wrong?
2007-04-09 14:36:53 · 4 answers · asked by Alley 2 in Science & Mathematics ➔ Chemistry
You seem to be going about thing the wrong way. The valances help you determine the chemical formula of the various chemicals. Once you have that, the equations balance g-atoms of the elements.
To make a long story short,
CaO + H2O -> Ca(OH)2 + H2
BTW, the numbers are not valances, they are the number of atoms of a given element. For example, naturally occuring hydrogen is a dimer of 2 H atoms bonded to each other. H2O is a compound where 2 hydrogens bond to one oxygen. CaO is a compound composed of Ca+2 ions and O-2 ions. Ca(OH)2 is an hydroxide of Ca+2. Since the OH group has a negative 1 charge, two are required to balance the charges.
2007-04-09 14:48:12 · answer #1 · answered by cattbarf 7 · 3⤊ 0⤋
CaO + H2O = Ca(OH)2 quicklime + water= slaked lime CaCo3 is limestone, whilst heated, you get Cao or quicklime. CaO reacts violently with water and that they produce calcium hydroxide, it is a white powder.
2016-12-20 10:09:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
How do I write the equation for calcium hydroxide
2015-12-08 15:40:36 · answer #3 · answered by ? 1 · 0⤊ 0⤋
Ca(OH)2 + H2O = CaO + 2H2O
2007-04-09 14:41:55 · answer #4 · answered by Sara 2 · 0⤊ 2⤋