Another acidic DP (1 Viewer)

[countrydude]

I can never rember doing this prac nor is it in my book.

-choose equipment and preform a first hand investigation to identify the pH of a range of salt solutions.

If anybody could help me out or give me a few pointers it would be greatly appreciated.

(i hate conc chem cauz it has no pracks )

 

[MyLuv]

-Dissovle 5g salt in 20mL water
-Put a PH probe in,record the result

 

[Nezz]

Downloaded from hsc online... this is all they had

Choose the most appropriate equipment available to you. If possible, a pH meter or data logger with probe would be most suitable, otherwise select indicator solution or indicator paper to measure the pH of the salt solutions.
To ensure you perform a valid investigation, prepare solutions of salts of equal concentration. Suitable salts are ammonium chloride (NH4Cl), sodium chloride (NaCl), sodium carbonate (Na2CO3) and potassium acetate (KCH3COO).

In my notes i just had...
~ Strong base+strong acid -> pH= 7

~ Strong Base+weak acid -> ph >7

~ Weak base+strong acid -> ph <7

~ Weak base+weak acid -> ph=7

 

[mei_ling03]

Originally posted by Nezz
Downloaded from hsc online... this is all they had

In my notes i just had...
~ Strong base+strong acid -> pH= 7

~ Strong Base+weak acid -> ph >7

~ Weak base+strong acid -> ph <7

~ Weak base+weak acid -> ph=7

additional info: ph is due to the conjugates produced

 

[Hotdog1]

i remember there is something about the number of H+ and OH- ions present in water as a result of the anion/cation?