Chemistry - November 2006

Do biology, chemistry, and physics labs at the college level receive a bad reputation because they are generally difficult or just because they're time consuming?

2006-11-04 07:38:03 · 6 answers · asked by robcarbone2002 1

2006-11-04 07:12:12 · 6 answers · asked by Melanie V 2

Can anyone tell me in detail on how to identify a electrolyte and a nonelectrolyte? Also between strong electrolyte and weak electrolyte? thanks.

2006-11-04 06:53:03 · 4 answers · asked by nikk 1

just right down facts please. no, "I think that..." comments.

2006-11-04 06:49:59 · 2 answers · asked by *gasp* it's me! 3

How many electrons can occupy atomic orbitals with the principal quantum number 3 ?

2006-11-04 06:46:14 · 1 answers · asked by Anonymous

How many atomic orbitals can have the principle quantum number 3?

2006-11-04 06:45:24 · 2 answers · asked by Anonymous

2006-11-04 06:22:07 · 4 answers · asked by Apple 1

2006-11-04 05:56:27 · 1 answers · asked by turtle 2

Please show me how to do this: How many atoms are in 3.21 moles of gold?

2006-11-04 05:04:50 · 5 answers · asked by Anonymous

2006-11-04 04:47:21 · 3 answers · asked by Ratnavelu K 1

2006-11-04 04:26:32 · 2 answers · asked by toasteddeer 2

2006-11-04 04:24:13 · 4 answers · asked by green_rox 2

2006-11-04 04:19:37 · 1 answers · asked by SmoOth 1

The laboratory procedure is as follows:

Mix 2 grams of salicylic acid with 4 milliliters of acetic anhydride in a 125 milliliter Erlenmeyer flask.
Add 3 or 4 drops of concentrated sulfuric acid to the flask and stir.
This is an exothermic reaction and so heat will be liberated when the reaction starts. If the flask does not warm, add another drop of acid to the flask until the heating effect begins.
Once the heating effect is detected, heat the reaction mixture in a water bath at 50 degrees centigrade for 5 minutes in order to drive the reaction to completion.
Cool the flask and then ADD 40 MILLILITRES OF WATER. Stir the aqueous mixture until a solid is formed and becomes well dispersed in the liquid.
Filter the liquid by suction using a Hirsch funnel and wash with cold water.
Use hot water to crystallize the filtrate.
If necessary use carbon to decolorize.
WHAT IS THE WATER USED FOR?

2006-11-04 02:09:55 · 3 answers · asked by nafeesah a 1

increasing the concentration of reactant will increase the rate of a reaction.if a piece of magnesium ribbon is added to a solution of ethanoic acid the following reaction occurs.
magnesium + ethanoic acid = magnesium ethanoate

make a predication about what you think will happen when you react.Mg with different concentration of acid(0.5m,1.0m,1.5m,2.0m,2.5m) predict what the graph will look like.

explain your predictions using scientific theory ie collision/particle theory.

2006-11-04 02:01:37 · 2 answers · asked by lucybabe 1

Saturated solution is a solution containing maximum amount of solutes at a parituclar tempearture. Is any saturated solution not concentrated?

2006-11-04 01:46:20 · 6 answers · asked by Eric S 1

What is a practical solution if your analyte does not elute from the column? Does that mean k' is infinite?

2006-11-04 01:45:48 · 1 answers · asked by Anonymous

2006-11-04 01:43:13 · 1 answers · asked by uppalapati pradeep 1

2006-11-04 00:50:35 · 8 answers · asked by 2112 1

2006-11-04 00:36:33 · 2 answers · asked by Tegus 1

Rock salt contains some insoluble impurities such as sand and clay. I want to know how to obtain pure common salt from rock salt.

2006-11-03 23:55:17 · 4 answers · asked by son_ray 2

like topaz, emerald, saphiere etc is der anymore?

2006-11-03 22:45:06 · 8 answers · asked by stuck wif homeworks 2

We make stoneware Salt Glazed pipes and fittings by coal firing method. Since we donot get good colour on bottom rows in our down draft kilns we tried to experiment with using GERU i.e. clay with high iron oxide content. This gave very good results but we are being told it will be considered as glazing and not colouring. We need the clarification whether applying clay with high iron oxide content will be taken as glazing or colouring and whether this clay will be called glaze or colouring agent?

2006-11-03 21:43:36 · 3 answers · asked by nature_luv 3

2006-11-03 21:19:35 · 2 answers · asked by JOSHI BHARAT J 1

2006-11-03 21:05:53 · 4 answers · asked by Anonymous

What is the lethal dose of plutonium? Is that high or low for a toxic compound? How long is it retained in the liver? In bone?

2006-11-03 20:09:38 · 2 answers · asked by ? 6

Im currently doing my standard grade chemistry course and need your help.. I can't get the hang of valency numbers :(
My teacher shout at me beacuase i dont understand :'(
Please some one help me!

2006-11-03 19:58:18 · 4 answers · asked by George 2

Anything else I could use that does the same thing when mixed with water and corn starch? Just messing around.

2006-11-03 19:24:52 · 5 answers · asked by CoJo 1

if in real nobody has seen an electron then how can we say that an orbital contais only two electrons?

2006-11-03 18:03:07 · 7 answers · asked by bhaskar 2

What would happen if a person drank deionized water? Could a person live off that instead of drinking regular water?

2006-11-03 17:24:24 · 6 answers · asked by Steve 2