Chemical reaction changes the components of the reactant and often yield products that are chemically different from the reactants. While physical reactions do not change the components of the reactants.
When KOH and Cu(NO3)2 are mixed it yields copper(II) hydroxide and potassium nitrate. The balanced reaction is:
Cu(No3)2(aq) + 2 KOH(aq)<span> = Cu(OH)2(s) + 2 KNo3(aq)
</span>
As we can see from the equation a solid is formed therefore a
precipitate is formed which is the copper (II) hydroxide which has a blue to
purple appearance. This can be observed since copper
(II) hydroxide has a low
solubility in aqueous solution.
Standard:560,000
Short form: 560 thousand
Word form: Five hundred six hundred thousand
Expanded form: 500,000+60,000
180 degrees
if it is bent (meaning there is a lone pair of electrons on Se) it is 109.5 degrees
O2 is the limited reactant