Which one of the following is the weakest acid?
HF 6.8x10^-4
HNO2 4.5x10^-4
HOBr 2.5x10^-9
HCN 4.9x10^-10
Which of the pairs can't be used to make a buffer solution?
NH3 & NaC2H3O2
H2S & NaHS
NH3 & NH4Cl
HC2H3O2 & NaC2H3O2
Which solution would have the lowest [H3O+]?
0.10 M Na2SO4
0.10 M NaCN
0.10 M NaNO3
0.10 M NH4C2H3O2
What's the net ionic equation for the reaction that occurs when HCl is added to the NaHCOO/HCOOH buffer?
H+ + OH- ---> H2O
HCl + OH- ---> H2O + Cl-
HCl + HCOO- ---> HCOOH + Cl-
H+ + HCOO- ---> HCOOH
help!!! please :)
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