Write a balanced, net ionic equation for the precipitation reaction of cacl₂ and cs₃po₄ in an aqueous solution. remember to include the proper physical states and charges of ions. when writing ions, if a charge number is not "1", place the charge number before the charge sign. if a charge sign is "1", do not include the charge number in the formula.

3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)

Explanation:

We can write 3 kinds of equations:

The reaction between CaCl₂ and Cs₃PO₄ in an aqueous solution is a precipitation (solid Ca₃(PO₄)₂ is formed) and a double displacement one.

Molecular equation

3 CaCl₂(aq) + 2 Cs₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) + 6 CsCl(aq)

Full ionic equation

3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 Cs⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 Cs⁺(aq) + 6 Cl⁻(aq)

Net ionic equation

3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.