Chemistry - September 2006

Would a benedict's solution turn the SAME solution in 5 tubes different colors when heated... WHY

I have a question concerning it on a lab and I'm having a hard time thinking of an answer. I had the same solution turn five different colors, and I was wondering if it was just because of human error (maybe I got a little bit of a different solution in the buret.. or what)

Please help end this confusion.. thanks in advance.

2006-09-07 12:41:29 · 3 answers · asked by gravytrain036 5

Okay, I did a lab in class, but I'm having a little trouble with answering the questions about the lab... so your help would be much appreciated.

Okay, so first I added NH4OH, AgNO3 and glucose to a test tube.I saw that silver was coating the inside of the test tube, but the question is:

1. *Explain how the presence of glucose allowed this coating to form*

I thought the reaction of NH4OH and AgNo3, would produce NH4NO3 and AgNo3 (a precipitate), but apparently ther's more to it. I just really don't know where to add the C6H12O6 into the equasion. I don't need the equasion, I just need to understand what glucose has to do with it.

And I also have another question....
I added 5ml of Benedict's solution (it detects reducing sugars such as glucose and fructose) to 5 test tubes. THen to each of those 5 test tubes I added 8 drops of 2% glucose solution. I then heated the mixtures for ...

Guaranteed "best answer" to the most helpful answer.

Thanks in advance

2006-09-07 12:17:30 · 3 answers · asked by gravytrain036 5

The moonflower grows in southern Utah. It has white floweres and is a bushy plant

2006-09-07 11:23:02 · 1 answers · asked by Arlo 1

2006-09-07 11:19:22 · 3 answers · asked by openupthemic 3

2006-09-07 11:17:13 · 5 answers · asked by dustymiller 1

2006-09-07 11:16:09 · 5 answers · asked by person 1

2006-09-07 10:51:05 · 8 answers · asked by Candace G 1

2006-09-07 10:40:53 · 2 answers · asked by evaneb44 1

2006-09-07 10:35:18 · 3 answers · asked by Anonymous

2006-09-07 10:27:50 · 6 answers · asked by the dude who knows it all 1

For example Minute Maid Home Squeezed Style Orange Juice has Vitamin D, Vitamin C and Calcium among other nutritional factors.

How can they do that? Is it liquid and they injectate it?

2006-09-07 10:19:40 · 5 answers · asked by Ya no estoy en Y!R por Facebook! 6

2006-09-07 10:10:08 · 3 answers · asked by bribrischuss 1

which is a physical change and

2006-09-07 10:02:02 · 8 answers · asked by marie anna b 2

2006-09-07 09:42:08 · 6 answers · asked by star123 2

Tell me name of following compound:
CH3-C-CH2-CH3
........ // ...............
.........CH2...........

2006-09-07 09:15:56 · 8 answers · asked by star123 2

2006-09-07 09:14:00 · 9 answers · asked by Anonymous

What is 2-methyl-1,3- Butadiene?
Please give structural formula.

2006-09-07 08:47:12 · 5 answers · asked by star123 2

2006-09-07 08:32:35 · 20 answers · asked by B F 2

Please tell me the name of following compounds:


CH3-CH2-CH2- C -O-CH2-CH3 (Here, double bond with carbon)
......................... // ...................
......................... O ........................

2006-09-07 08:26:04 · 5 answers · asked by star123 2

2006-09-07 08:08:54 · 2 answers · asked by chainedbyroses 1

I am just begining to learn about Chemistry. I am interested to figure out radioactivity works, but need the dummies version of explination.

2006-09-07 07:23:47 · 3 answers · asked by Anonymous

2006-09-07 07:08:13 · 8 answers · asked by pkv19702000 1

I need to find how many Oxygen atoms are in 1 gram of Al2(SO4)3. I have tried finding the mass percent, and working it from there, but I can't get the right answer. Does anyone know how to solve this?

2006-09-07 06:42:02 · 3 answers · asked by consumingfire783 4

I am in a beginning Chemistry class and we conducted an experiment where we separated a mixture of sodium chloride and calcium carbonate by dissolving it into DI water and then filtering out the solid left-overs. My question is, why is using DI water so important, what if we used regular tap water? Would it affect the separation of the two compounds?

2006-09-07 06:35:54 · 11 answers · asked by Anonymous

1-Reaction of sodium hydroxide and hydrochloric acid.
2-Reaction of sodium hydroxide and oxalic acid.
3-Reaction of potassium hydroxide and sulphuric acid.
Tell me only if you are sure since I have to write them in the journal.

2006-09-07 06:24:45 · 4 answers · asked by tejas_fundo 3

2006-09-07 05:40:19 · 10 answers · asked by Anonymous

2006-09-07 05:38:48 · 3 answers · asked by vinel10 4

how would you calculate the molarity of the aqueous solution?

a) 72.0 mL of 0.210 M NaOH diluted to 0.230 L with water
(and how many signifant figures would the answer need?)

2006-09-07 05:32:57 · 4 answers · asked by Anonymous

The reason was because the plastic breaks down and puts chemicals in the water.

2006-09-07 05:16:26 · 20 answers · asked by butnozzle 2

2006-09-07 05:16:20 · 3 answers · asked by Vishnu 1