Chemistry - October 2006

2006-10-09 06:51:51 · 0 answers · asked by Dallas B 1

How can I determine what substances will react with copper and cause a patina? I am researching common, low toxicity methods of patinaing copper, such as borax, salt water, vinegar. I want to find more but am unsure how to approach the topic.

2006-10-09 05:58:29 · 1 answers · asked by coppersmith 3

"A student was titrating 15.0 mL of NaOH solution of unnknown concentration i a 100 mL beaker. After adding 17 mL of 0.01 M HCL, she realized she had forgotten to add the indicatior. She quickly added 2 drops of bromothymol blue indicatior and her solution went yellow immediately. What is the simplest procedure thi student can do to correct and finish her experimnt and not have to start over? Describe experimental procedures and mathematical analysis."

This is for my chem lab, and I'm not sure what to do. You could add more NaOH until the solution is neutralized, but that wouldn't tell you the concentration or even how much HCL you neutralized. Any ideas?

2006-10-09 05:26:41 · 2 answers · asked by Kiko 3

2006-10-09 05:09:22 · 9 answers · asked by Anonymous

Not nickle plated actual nickle

2006-10-09 05:01:00 · 5 answers · asked by EMO cupcake 4

Also what is a block and a family on the periodic table?
Thanks

2006-10-09 04:56:59 · 3 answers · asked by werdsoccer11 2

Help for my daughter... my chemistry classes were 25 years ago !! Thank you

2006-10-09 04:52:50 · 2 answers · asked by mariner31 7

Combustion analysis of 1.500 g of an unknown compound containing only carbon and hydrogen produced 4.554 g of CO2 and 2.322 g of H2O. What is the empirical formula of the compound?

2006-10-09 04:47:46 · 2 answers · asked by Alyssia S 1

The iron in the standard solution is the one commonly found in food.

2006-10-09 04:24:03 · 2 answers · asked by J Go 2

2006-10-09 03:23:01 · 5 answers · asked by unquenchablethirst 2

2006-10-09 03:16:03 · 2 answers · asked by unquenchablethirst 2

2006-10-09 03:02:45 · 2 answers · asked by Ney 1

What is the formula for molality, molarity and normality!

2006-10-09 02:46:10 · 5 answers · asked by Yuna 1

CHEMISTRY!

What are the Gas Laws and their formula even without a definition!!

2006-10-09 02:44:57 · 6 answers · asked by Yuna 1

(free,combined with other elements,or both)

2006-10-09 02:20:35 · 5 answers · asked by Domonic R 1

is it possible to see an individual atom?

2006-10-09 02:08:47 · 6 answers · asked by Anonymous

2006-10-09 00:59:41 · 8 answers · asked by lianne_720 2

2006-10-08 22:04:14 · 1 answers · asked by jher 1

2006-10-08 21:34:33 · 11 answers · asked by SICK MY DUCK! 1

how thick is a layer of electroplating? ie on steel .. is it practical to assume you can build up layers at a microscopic scale?

2006-10-08 20:37:02 · 8 answers · asked by Julia W 1

2006-10-08 20:06:14 · 8 answers · asked by andavar a 1

2006-10-08 19:50:28 · 8 answers · asked by princess 1

Calculate the root mean square speed of nitrogen gas at 25 degrees C. What happens to the rms speed if the temperature is doubled to 50 degrees?

2006-10-08 19:28:49 · 1 answers · asked by Nodoudt 2

2006-10-08 19:21:37 · 5 answers · asked by T W 1

At a certain temperature and pressure an element has the simple body-centred cubic unit cell, depicted below. The corresponding density is 11.098 g/cm^3 and the atomic radius is 1.780 Å. Wat is the atomic mass for this element (in amu).

1 Å = 1.0*10^-8 cm

thank you.

2006-10-08 19:01:30 · 1 answers · asked by joejoe 1

2006-10-08 18:57:08 · 6 answers · asked by Michael H 1

H2SO4 + KOH ----> H2O + (what goes here?)

SO4 IS -2 and OH is -1

2006-10-08 17:58:55 · 5 answers · asked by ›tªmmy‹ 3

2006-10-08 17:10:31 · 1 answers · asked by thaiphile 1

2006-10-08 15:50:14 · 12 answers · asked by phathead962003 1

2006-10-08 15:25:39 · 1 answers · asked by brook 1