How to write equations for salt dissolving in water/ionizing

In summary, when writing equations for potassium salt (KH2PO4) dissolving in water and for the ionization reaction of the weak acid anion, both dissociation and hydrolysis should be considered. There is no strict rule for the first step and it is up to the instructor's discretion. The ionization reaction for the weak anion (H2PO4-) should be included in the equation.
  • #1
LegitSci
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Homework Statement


Write separate equations for each potassium salt (KH2PO4) dissolving in water and for the ionization reaction of the weak acid anion that each of these salts contains.

Homework Equations



None

The Attempt at a Solution


I just needed to clarify when it dissolves in water do I include that in reaction or just do a dissociation of the ion? Furthermore, for ionization reaction of weak anion, it is H2PO4, so what does this mean?[/B]
 
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  • #2
There is no strict rule to the first step (and I would have no problems if the first step was omitted, but your instructor can have a different opinion).

H2PO4- can dissociate. Actually it can also hydrolyze. Both reactions have to be listed.
 

1. What is the general equation for salt dissolving in water?

The general equation for salt dissolving in water is NaCl (s) → Na+ (aq) + Cl- (aq).

2. How do you write the ionic equation for salt dissolving in water?

The ionic equation for salt dissolving in water is NaCl (s) → Na+ (aq) + Cl- (aq). This equation shows the ions that are actually present in the solution, as opposed to the solid salt.

3. What factors affect the rate of salt dissolving in water?

The rate of salt dissolving in water can be affected by factors such as temperature, agitation, surface area of the salt, and concentration of the solution.

4. How do you account for multiple ions when writing equations for salt dissolving in water?

If the salt contains multiple ions, such as MgCl2, the equation would be written as MgCl2 (s) → Mg2+ (aq) + 2Cl- (aq). The numbers in front of the ions represent the number of each ion present in the solution.

5. Can you write an equation for salt dissolving in water with a spectator ion?

Yes, for example, if the salt is KBr, the equation would be KBr (s) → K+ (aq) + Br- (aq). The K+ ion is a spectator ion and does not participate in the reaction.

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