Answer the previous posted question and then post a question of your own, let's keep them conceptual. I will start with a question: How do I identify when a salt is amphoteric?
It is a salt that can act as an acid or a base in water and contains an anion. How can you increase the solubility of CA(CH3CH2COO)2 and why does it increase?
The solubility of molecules, such as Calcium propanoate, can be increased by increasing the temperature. Increasing the temperature increases the solubility because there is an increase in kinetic energy, meaning the molecules can break apart more easily. Which compounds are always insoluble?
Solubility can be predicted based on the solubility rules from C105. Many compounds are soluble, but notable exceptions are silver, mercury, and lead combined with Cl, I, SO4. SO4 or OH combined with Ca, Ba,or Sr will also be insoluble. Group 1 is also insoluble with CO3, PO4, OH, and S.
What is the difference between end point and equivalence point?
In a titration the equivalence point is when the number of moles of the base is equal to the number of moles of the acid. End point is when the indicator changes its color. These values are close together if a titration is done well.
Q: Why is a buffer solution useful and what would be an example of a good buffer solution?
If the solutions are both strong the pH will be 7. If there is a strong acid and weak base, the pH will be more acidic than 7 and if there is a strong base and weak acid then the pH will be more basic.
What does it look like on a graph, and what does it mean to reach the half equivalence point?
It is a salt that can act as an acid or a base in water and contains an anion.
ReplyDeleteHow can you increase the solubility of CA(CH3CH2COO)2 and why does it increase?
You gave a definition which is correct. But if you are looking at a compound, what would an identifying feature of it being amphoteric?
DeleteThe solubility of molecules, such as Calcium propanoate, can be increased by increasing the temperature. Increasing the temperature increases the solubility because there is an increase in kinetic energy, meaning the molecules can break apart more easily.
ReplyDeleteWhich compounds are always insoluble?
What you are saying is logical. However, it does depend upon whether the dissolution process is endothermic or exothermic.
DeleteSolubility can be predicted based on the solubility rules from C105. Many compounds are soluble, but notable exceptions are silver, mercury, and lead combined with Cl, I, SO4. SO4 or OH combined with Ca, Ba,or Sr will also be insoluble. Group 1 is also insoluble with CO3, PO4, OH, and S.
ReplyDeleteWhat is the difference between end point and equivalence point?
In a titration the equivalence point is when the number of moles of the base is equal to the number of moles of the acid. End point is when the indicator changes its color. These values are close together if a titration is done well.
ReplyDeleteQ: Why is a buffer solution useful and what would be an example of a good buffer solution?
A buffer solution is useful because it maintains ph within a narrow range. A good example would be bicarbonate in our blood acting as a buffer.
ReplyDeletewhat is one way to alter the Ksp value?
Change the temperature of the solution.
ReplyDeleteHow can you tell if a titration solution will have a more acidic or basic pH after the addition of the titrant, regardless of amounts?
Kathryn and I both assumed you meant at the equivalence point.
DeleteIf the solutions are both strong the pH will be 7. If there is a strong acid and weak base, the pH will be more acidic than 7 and if there is a strong base and weak acid then the pH will be more basic.
ReplyDeleteWhat does it look like on a graph, and what does it mean to reach the half equivalence point?
Thanks for your responses!
ReplyDelete