heylo dat'ers
i was doing destroyer, and i came across 2 probs i'm confused about, i dont know if its bc im losing my mind or if i just really dont understand but anyway ....
# 231 for gen chem--How many ml of 0.12M KOH must be added to 60ml of 0.20M HF to produce a soln with a ppH of 3.3 (pka of HF=3.3)
the answer is a........but i set the problem up like
(x)(0.12M)=(60ml)(.20M)
(x) (0.12 M)= TWELVE
12 / 0.12 ==a hundred (100) , and i would divide 100 by 2 because ur titrating a weak acid with a strong base so youd only need half the strong base.
am i CRAZY and is 60 x 0.2 not 12 .....or is it 1.2?? why is destroyer saying the answers 5 and not 50.......did i mess up?? or is this a typo? er wats going on
2nd question--#238 gen chem --Which set of quantam # best describes a valence e- in Ge?
Germanium electron config: (Ar)4s2 3d10 4p2
the answers B: 4, 1, 1, 1/2
which would be for the P valence subshell
how come S isnt counting as valence (ie-why cant the answer also be a)? because its full? i thought u just dont count D as valence when its full....but ud count s and p if theyre outside the noble gas config.
omg ive lost my mind.
thanks for reading this messs.................
i was doing destroyer, and i came across 2 probs i'm confused about, i dont know if its bc im losing my mind or if i just really dont understand but anyway ....
# 231 for gen chem--How many ml of 0.12M KOH must be added to 60ml of 0.20M HF to produce a soln with a ppH of 3.3 (pka of HF=3.3)
the answer is a........but i set the problem up like
(x)(0.12M)=(60ml)(.20M)
(x) (0.12 M)= TWELVE
12 / 0.12 ==a hundred (100) , and i would divide 100 by 2 because ur titrating a weak acid with a strong base so youd only need half the strong base.
am i CRAZY and is 60 x 0.2 not 12 .....or is it 1.2?? why is destroyer saying the answers 5 and not 50.......did i mess up?? or is this a typo? er wats going on
2nd question--#238 gen chem --Which set of quantam # best describes a valence e- in Ge?
Germanium electron config: (Ar)4s2 3d10 4p2
the answers B: 4, 1, 1, 1/2
which would be for the P valence subshell
how come S isnt counting as valence (ie-why cant the answer also be a)? because its full? i thought u just dont count D as valence when its full....but ud count s and p if theyre outside the noble gas config.
omg ive lost my mind.
thanks for reading this messs.................