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If I have electron configuration, I have to fill 4s first then 3d. Does that mean 4s energy is lower than 3d? Also, does that mean that in the 4th shell electron orbit the atom will receive 2 electrons first (due to fulfill the 4s subshell) and then fill 10 electrons into the 3rd atomic shell (due to fulfill the 3d subshell)? Thank you.
A 0.415 g sample of KHP will be titrated with a NaOH solution with an assumed concentration of 0.100 M.
Calculate the volume of NaOH that should neutralize the KHP sample.
Complete this table to show the pH and pOH of each solution.
(H+ is short for H3O+)
[H+] [OH−] pH pOH
Solution A 1.0×10−5 5
Solution B 1.0×10−10 10
Solution C 1.0×10−12
Solution D 10
Solution A [OH−]=
M
Solution A pOH=
Solution B [H+]=
M
Solution B pH=
Solution C [OH−]=
M
Solution C pH=
Solution C pOH=
Solution D [H+]=
M
Solution D [OH−]=
M
Solution D pOH=
Calculate the [OH−] and the pH of a solution with an [H+]=4.0×10−13 M at 25 °C .
[OH−]=
pH=
Calculate the [H+] and the pH of a solution with an [OH−]=9.8×10−13 M at 25 °C .
[H+]=
pH=
Calculate the [H+] and the [OH−] of a solution with a pH=3.52 at 25 °C .
[H+]=
[OH−]=
Explain why electron affinity decreases down the group
25.7 ml of 0.487 M HCl and 15.4 ml of 0.765 ml NaOH are mixed.
Determine the mmol of HCl and NaOH in the two solutions that are being mixed.
mmol HCl
mmol NaOH
Which reactant is present in excess?
Is the solution acidic, basic or neutral?
25.7 ml of 0.487 M HCl and 15.4 ml of 0.765 ml NaOH are mixed.
Determine the mmol of HCl and NaOH in the two solutions that are being mixed.
Which reactant is present in excess?
Is the solution acidic, basic or neutral?
What is the concentration of a 53.80 mL solution of HBr that is completely titrated by 35.00 mL of a 0.200 M NaOH solution?
A 0.415 g sample of KHP will be titrated with a NaOH solution with an assumed concentration of 0.100 M.
Calculate the volume of NaOH that should neutralize the KHP sample.
What are the concentrations of OH− and H+ (H+ is short for H3O+) in a 0.00070 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.
