Chemistry - August 2007

From the list below, pick the one species that cannot act as both a Bronsted-Lowry acid and base. 
 
A. HCO3-
B. H2SO4-
C. H2PO4-
D. OH-
E. HPO42-
 

I used to know how to do these; I understand that a conjugate acid has one more H, and a conjugate base has one fewer. I'm trying to get back in the swing of things to take Organic Chemistry 1 this Fall, so I'd appreciate any help offered...

I'm *thinking* the answer is OH-?

2007-08-12 09:10:10 · 4 answers · asked by Henry H 1

2007-08-12 09:08:10 · 2 answers · asked by ngathile 2

2007-08-12 08:45:16 · 2 answers · asked by Anonymous

a. CH3CH2CO2CH3
b. CH3CH2CO2H
c. CH3CH2CH(OH)OCH3
d. CH3CH2CH(OCH3)2

2007-08-12 08:00:39 · 3 answers · asked by dave b 2

of a weak nucleophile with the carbonyl group of an aldehyde or ketone?

a. I–
b. H3O+
c. AlCl3
d. BF3

2007-08-12 07:58:56 · 2 answers · asked by dave b 2

does co2 have a taste?
water have no taste but soda water(contains co2) does have a taste.

2007-08-12 06:44:15 · 3 answers · asked by Anonymous

2007-08-12 05:36:41 · 6 answers · asked by Dimpho T. L. M 1

a. hexyne
b. hexene
c. methylbenzene (toluene)
d. ethanol
e. candle wax.

2007-08-12 05:36:24 · 8 answers · asked by sikhism4life88 1

PLZ ANSWER me soon with steps

2007-08-12 04:08:07 · 2 answers · asked by sweety 1

1. A certain atom has an atomic number of 15 and a mass number of 16. What is its electron configuration?

2. The element gallium exists in two isotopic forms with the following abundances: 60.16% Ga-19 and 39.84% Ga-17. Calculate the atomic mass of gallium.

Thanks in advance... God bless...

2007-08-12 02:00:29 · 4 answers · asked by Menz 1

2007-08-12 01:19:41 · 2 answers · asked by juLy a 1

Naphtalene's structure composed of two benzene ring. Does it affect its melting point?

Thanx for all

2007-08-12 01:05:23 · 2 answers · asked by Doc^chem 2

2007-08-12 00:13:01 · 2 answers · asked by nonothing 1

2007-08-12 00:01:55 · 2 answers · asked by ann 1

2007-08-11 23:55:09 · 4 answers · asked by Udawg 1

hi where almost thru w/ this...
can you name
Pb(C2H3O2)+K2CrO4 ----->PbCrO4+KC2H3O2

Is Pb(C2H3O2) ... Plumbum acetate....


BALANCING....
Ba(OH)2 + CO2 ------->BaCO3 + H2O
=WHAT????????


im always confuse what haappens to OH bcoz it turns to H2O
is this right..

2Ba(OH)2 + 3CO2 ------->2BaCO3 + H2O

but O of H2O is not balance w/ O of OH..
How do you make it simpler????

Thank you...

2007-08-11 23:23:53 · 2 answers · asked by Anonymous

a.perspiration evaportaing
b.peanut brittle hardening
c.snow turning into water
d.aspartame, a sugar substitue, decomposing when heated
e.sodium metal in contact with chlorine emitting a bright light.
f.making ice cream from sugar and cream
g.dew forming on plants
h.trinitrotoluene explodeing when heated

2007-08-11 23:03:53 · 6 answers · asked by Pradeep k 2

2007-08-11 22:50:32 · 2 answers · asked by spaceage boy 1

Are the minerals and vitamins in Mineral Water Inorganic?

I've heard that the minerals are inorganic, and is not suitable for the body. Is this true?

2007-08-11 22:43:35 · 2 answers · asked by KCWS 2

its 4 our sub. science..^-^

2007-08-11 20:45:34 · 1 answers · asked by Kris 1

I misprinted my last question, so I'm going to try again with the correct equation:

CoS + HCl + HNO3 ----> Co (2+) + S + NO + H2O + Cl-

2007-08-11 20:25:15 · 2 answers · asked by greensock 5

2007-08-11 18:25:16 · 4 answers · asked by organic chem 1

1) Silver chloride, AgCl, would be least soluble in
1.0 M AgNO3
1.0 M HCl
1.0 M NaNO3
1.0 M ZnCl2

2)The solute AgBr is least soluble in
1.0 M AgNo3
1.0 M FeBr3
H2O
1.0 M CaBr2

3)The concentration of Fe2+(aq) can be determined by a redox titration using
KMnO4 (basic)
SnCl2
KBrO3 (acidic)
KBr

Thanks for all the help in advance.

2007-08-11 17:55:11 · 1 answers · asked by chubby chicken. 1

What would you do if there were a bubble in the stem of the burette as you were about to start the titration?
NOTE: it's in the stem , not in the tip.
Thanks in advance!!

2007-08-11 16:47:11 · 4 answers · asked by GooGi 1

2007-08-11 16:31:50 · 8 answers · asked by Anonymous

at high temperature, what other compounds besides ammonia have a lower solubility than that of potassium nitrate?

2007-08-11 16:30:54 · 2 answers · asked by stayyoung 3

A solution is made by dissolving 7.50g of NaOH, which contains some impurities in water and making up the solution to 250cm^3 of the solution. If 25.0cm^3 of the solution is exactly neutralized by 14.0cm^3 of nitric acid of concentration 1.00mol/dm^3, calculate the percentage purity of the sodium hydroxide.

2007-08-11 16:24:17 · 3 answers · asked by Stormy Knight 1

1. keq for the reaction 2 h2o(g) > 2 H2(g) + O2(g) is 2.9 x 10^-82. What does the value of keq reveal about the reaction? Suppose a container holds 1.55 M H2o(g). 7.00 x 10^-23 M H2(g), and 4.72 x 10^-15 M O2(g), Is the system at equilibrium? If not, in what direction will he reaction proceed?


2. Given the equation OF2(g) + H2O(g) >< O2(g) + 2 HF(g) + 318 kJ. predict the direction of shift in the equilibrium position if (a) OF2 is added. (b) H2O is removed (c) pressure is increased, and (d) temperature is loered. In each case, briefly explain your answer.

2007-08-11 15:54:47 · 1 answers · asked by ashley t 1

1)Which of the following forms a molecular solution in water?
a)NH4CH3COO
b)C6H12O6
c)Na3PO4
d)SrSO4

2) The predominant acid-base reaction between H2O22 and H2O is
a)H2O22 + H2O --> H3O2+ + OH-
b)H2O22 + H2O --> 3OH- + H+
c)H2O22 + H2O --> H3O+ + HO2-
d)H2O22 + H2O --> 2H2O + O2-

explanations would be greatly appreciated

2007-08-11 14:23:50 · 1 answers · asked by chubby chicken. 1

I've seen on most periodic tables it is listed as a solid, yet on some others it is listed with mercury and bromine as a liquid element. What is it truly listed as?

2007-08-11 14:22:04 · 5 answers · asked by Zack 1