Chemistry - March 2007

I seem to keep messing up trying to write the reaction in terms of Acid(1) + Base(2) = Base(1) + Acid(2). On the first reaction I know HF is the acid and therefore F^1- is the conjugate base but I can not put it all together. Below are the reactants I am having problems with. And I have no clue to find K for any of them. I am given this website to help me. hxxp://www.pearsoncustom.com/wertz/a_cd/caqs/html/resource/acidbase_pka.html.


Reactants:
1. hydrofluoric acid + potassium cyanide
2. hydrochloric acid + sodium hydroxide
3. formic acid + sodium nitrite
4. KHCO3 + KCN
5. H2SO3 + K2SO4

Please help me and explain. Thank You.

2007-03-14 11:23:42 · 3 answers · asked by Tyler S 1

Which of the following substances would you expect to dissolve in water?

a) K2SO4

b) Cu(NO3)2

c) CH3CH2OH

d) C (diamond)

e) CH3CH3

2007-03-14 11:16:39 · 3 answers · asked by garture 1

2007-03-14 11:14:57 · 4 answers · asked by Ricky 1

I'm working on a Chemistry project in which I'll be mixing up some sparklers (yeah I know I'll be careful) and I've researched it just like all the other color chemicals but nothing has told me where I can get them! They aren't too dangerous in this form, but they're crucial for the stabilazation of my mixture. Strontium nitrate is used in road flares, and both are used in fireworks, but is there a product I don't have to tear apart to get at them or somewhere I can buy them outright?

2007-03-14 11:13:17 · 4 answers · asked by Anonymous

I know it is expensive, but if you know of a way to get it cheap, it would be much appreciated.

Thanks in advance!

2007-03-14 11:12:17 · 3 answers · asked by martin_pc_maintenance 3

Calculate the pH at the following points in the titration of 50.00mL of a 0.0100M NaOC6H5 solution with HCl. The Ka of HOC6H5= 1.05x10^-10
(a) Midpoint, (when 1/2 base is neutralized)
(b) Equivalence Point, (after all base is neutralized)

2007-03-14 11:08:56 · 1 answers · asked by malibucat1 1

The label on the shampoo claims that it is pH balanced. What exactly does pH balance mean?

2007-03-14 10:56:09 · 8 answers · asked by chelsea_cruz20 1

2007-03-14 10:44:42 · 4 answers · asked by Inquisitive-me 1

1.x3-
2.x1+
3.x2+
4.x-

2007-03-14 10:36:04 · 3 answers · asked by Anonymous

A student has a glass coffee table in their dorm room that they want to stack some of their books on. However they are a little worried about how much pressure the table can withstand at any one point.

If the pile of books has a mass of 13.00 kg, a length of 30.48 cm, a width of 25.40 cm, and
a height of 28.33 cm, how much pressure (N/m2) must the table be able to withstand at any place
where the books are placed ?

2007-03-14 10:33:16 · 3 answers · asked by garture 1

A He2
B Li2
C H2
D F2
E N2

2007-03-14 10:32:29 · 2 answers · asked by cat_ren_03 1

(I) the high solubility of ethanol in water
(II) the high boiling point of propanoic acid compared to butan-1-ol with similar molar mass
(III) the appearance of a broad OH peak in the infrared spectrum of an alcohol, at about 3400 cm-1
(IV) the formation of dimers of ethanoic acid in the liquid phase

A I, II & III
B II & III
C II, III & IV
D I, II, III & IV
E II & IV

2007-03-14 10:26:30 · 3 answers · asked by cat_ren_03 1

1. What element is present in ions having both the -ate and -ite suffixes?

2.What is the difference between NO2 with a negative charge above it and NO2 with no charge above it.

3. Which ion is shown first when writing the formula of an ionic compound?

2007-03-14 10:25:31 · 1 answers · asked by Anonymous

please explain steps if possible

2007-03-14 10:25:18 · 1 answers · asked by sarah 2

How, when I am shown diagrams of isomers, can I determine which is a structural and which is a geometric isomer?

2007-03-14 10:24:54 · 2 answers · asked by Anonymous

2007-03-14 10:23:44 · 5 answers · asked by Anonymous

A 1.5 and 2.5
B 2.0 and 3.0
C 2.5 and 2.5
D 3.0 and 2.0
E 2.5 and 2.0

2007-03-14 10:20:22 · 1 answers · asked by cat_ren_03 1

I am doing a 5-10page paper on the chemical effects of psychotropic drugs for an Intro Chem course. I am having a hard time because I keep running into psychological effects on the brain (which isn't bad, but not what I am looking for), but shockingly I can't find much on the actual chemical compositions and biochemical reactions of such drugs. I think I am looking in the wrong places. Should I be looking more at pharmacology and botany instead of psych. and biology? I want sources at the level between the grad. school theses and the "don't do drugs" stuff.

2007-03-14 10:19:55 · 2 answers · asked by cookiesrme 4

2007-03-14 10:19:26 · 3 answers · asked by Jayme S 2

the dissociation equation for each of these in water
a. HNO3
b.KOH
c.H3PO4
d.HF
e.HONH2

Identify the acids n bases.conjugate acids and conjugate bases in the following

a.OH- + H3O+ ------>H2O + H2O
b.NH3 + H3O+ ------>NH4+ + H2O
c.CH3OH + NH2 ------>CH3O- + NH3
d.NH2 + H2O ------>NH3 + OH-
e.H2O + HClO4 ------>H3O+ + ClO4

classify the following substances as Lewis acids or Lewis bases

a.Cl-
b.CO3 (2-)
c.Na+
d.Br-

PLEASE HELP THANX

2007-03-14 10:17:17 · 2 answers · asked by PinK Lady ♥ :] 2

2007-03-14 10:15:29 · 15 answers · asked by spongebobs biggest fan 5

how would you go about (as in procedures) to determine the solubility of NaCl? aka sodium chloride aka salt :D

2007-03-14 10:11:45 · 1 answers · asked by Anonymous

Joining 2 glucose molecules to make maltose is caused by:
anabolic or catabolic reactions? is spontaneous or non spontaneous? is exerogonic or endergonic reaction?

2007-03-14 10:02:08 · 1 answers · asked by mathelp 2

Which of the following statements about boiling points of molecular substances are correct ?


a) HF has a higher boiling point than F2

b) For the boiling points of hydrogen compounds of Group 16
H2Te > H2Se > H2S > H2O

c) For the boiling points of hydrogen compounds of Group 17
HF > HI > HBr > HCl

d) For the boiling points of hydrogen compounds of Group 14
CH4 > SnH4 > GeH4 > SiH4

2007-03-14 10:01:52 · 3 answers · asked by garture 1

When 2-butene reacts with hydrogen chlorine gas, only one product is detected, whereas when 1-butene reacts similarly, two products are usually found. Explain this.

2007-03-14 09:59:46 · 2 answers · asked by Anonymous

2007-03-14 09:58:37 · 1 answers · asked by Anonymous

2007-03-14 09:58:13 · 3 answers · asked by Roger 1

Ortho-nitrobenzoic acid or para-nitrobenzoic acid

2007-03-14 09:44:40 · 4 answers · asked by Anonymous

1. I F6
2.Br3 O8
3.P4S3
4.Cl2 O5
5.CLO2
6.SiCl4
-note all numbers are below the elements

2007-03-14 09:34:35 · 1 answers · asked by Anonymous

2007-03-14 09:25:40 · 2 answers · asked by Youngboss 3