Chemistry - March 2007

Just started this today, not sure if I'm doing this right.

I have 10 mL of 0.1 M HCL and 20 mL of 0.1 M NaOH. It asks for the moles of H+, Moles of OH-, Moles of excess H+ or OH-, Total Volume, Concentration of {H+} or {OH-}, and finally the PH.

I can get most of the answers, and I get 1 Mol, 2 Mols, 1 Mol, 30 mL Total, and 33.333 for the Molarity, respectively. but my answer for pOH is approx. -1.5 making my pH a very low number... I know negative Phs are possible in calculations, but I'm not sure about this.

2007-03-19 13:21:35 · 2 answers · asked by jhfd1234 3

I need help wid 2 chemistry questions

1) Discuss the necessity of standards.
2) Why do scientists use STP? (atleast 2 reasons)

say the general answer to the 2 questions first and then add what r the necessities of STP in gases, vol, temp, pressure. And why do scientists use STP in gases, vol, temp, pressure.

2007-03-19 13:13:10 · 1 answers · asked by Preeya 5

2007-03-19 13:06:24 · 1 answers · asked by Anonymous

I performed this experiment today and I have to do some discussion questions on it. Why is there more magnesium oxide formed than magnesium nitride when there is so much more nitrogen in the air? i dont get it....

2007-03-19 12:53:00 · 3 answers · asked by Anonymous

2007-03-19 12:46:22 · 7 answers · asked by =] 1

nonpolar bond
dispersion forces
hydrogen bonds
ionic bond
none of the above

2007-03-19 12:34:25 · 4 answers · asked by ALI L 1

Suppose 25.65mL of 0.106M NaOH solution is required to completely react 10.00mL of HCl

2007-03-19 12:30:48 · 4 answers · asked by bigtex24769 1

higher
lower
same
higher when a surfactant is added

2007-03-19 12:21:20 · 3 answers · asked by ALI L 1

ionic
nonpolar covalent
polar covalent
network solid

2007-03-19 12:19:51 · 3 answers · asked by ALI L 1

I want to electroplate 3 copper bullets with nickel. What all do I need? I understand the basic concept, but whenever I tried, the water would turn all nasty and look like something that you might see floating on top a septic tank,and the objects on both the cathode and the anode would get all screwed up. I was very unsuccessful.

2007-03-19 12:15:41 · 1 answers · asked by Anonymous

2007-03-19 12:15:00 · 3 answers · asked by ALI L 1

2007-03-19 12:08:20 · 2 answers · asked by ♥y! answers_princess 2

K + CL ---> K+ CL-

Which one is the oxidizer … and which one is the oxidizee ?
And which one is the reducer … and which the reducee ?

2007-03-19 12:02:28 · 4 answers · asked by Anonymous

a)london forces and dipole-dipole
b)dipole-dipole and hydrogen bonding
c)hydrogen bonding and ion-ion attraction
d)only dipole-dipole
e)london forces and ion-ion attractions

2007-03-19 11:53:03 · 2 answers · asked by universitystudent 2

linear
trigonal planar
tetrahedral
bent

2007-03-19 11:51:04 · 4 answers · asked by ALI L 1

heres my equation: Na2CO3 + H2SO4 ---> Na2SO4 + H2O + CO2...is that right? now how do i find the amount of sodium carbonate i will be using? i can work out concentration later....at the moment im writing my plan for a titration i will be carrying out at school. i am doing AS level chemistry. PLEASE HELP! ive been up for hours already and i dont know how to do it!

mole ratio is 1:1 yeah? then wat? do i have to find the RFM of Na2CO3? or what??

HELP!!!!!!!!!!!!!!
thanks, need advice tonight, its in for tomorrow!
charl x

2007-03-19 11:46:26 · 3 answers · asked by Anonymous

2,3 dimethylheptane
2,4 diethyl - 1 pentene
4 bromo, 2 methyl, 1 heptyne
2 methyl- cyclohexanol

2007-03-19 11:33:33 · 4 answers · asked by Anonymous

How many grams = a pound?

2007-03-19 11:31:14 · 5 answers · asked by sunkisttyler 1

Can anybody, in plan English, explain to me what Glycolysis means?

2007-03-19 11:29:22 · 5 answers · asked by vanessa s 1

2007-03-19 11:20:59 · 1 answers · asked by Speed, I Am Speed 2

2007-03-19 11:19:15 · 2 answers · asked by lamar w 1

I am taking (college) General Chemistry One (which i find challenging) and will take General Chem Two next semester. I was wondering if it is harder. some ppl say its easier.

I plan on taking General Biology with General Chem 2, (with spanish 1 too). Is that going to be impossible?? Anybody take General Chem 2 and Biology at the same time?

just to let you know i am a spanish speaker in case some ppl think that the spanish class will make it harder....

2007-03-19 11:14:01 · 3 answers · asked by Micheal 1 1

---1.71 x 10^-3 g of Silver
Silver's Atomic mass=22.99

---280.9 mg of Silicon
Silicon's Atomic mass=28.09

Please explain.
Thanks

2007-03-19 11:10:39 · 6 answers · asked by MGK 1

2007-03-19 11:03:03 · 9 answers · asked by mustang_20_12 1

2007-03-19 11:02:02 · 2 answers · asked by Anonymous

2007-03-19 10:58:07 · 2 answers · asked by Cute 1

Is sugar, alcohol, margarine polar or nonpolar

2007-03-19 10:49:15 · 3 answers · asked by num1grl 2

2007-03-19 10:49:10 · 1 answers · asked by gabster 2

Which solute is ionic? Sugar, water, alcohol or margarine?

2007-03-19 10:47:07 · 1 answers · asked by num1grl 2

2007-03-19 10:32:05 · 3 answers · asked by ♥y! answers_princess 2