Chemistry - June 2007

2007-06-26 09:01:47 · 1 answers · asked by fly 1

1.What does 10N H2SO4 mean? What concentration of H2SO4 does it refer to?
2. The Ksp of Mg(OH)2 in water is 1.2(10)^(-11). If the Mg2+ concentration in an acid solution is 1.2(10)^(-5) mol/L, what is the pH at which Mg(OH)2 just begins to precipitate?

2007-06-26 08:41:42 · 4 answers · asked by nick_zz 1

2007-06-26 06:37:50 · 4 answers · asked by heri623 3

i have searched WHO but there are no proper standards

2007-06-26 04:45:12 · 2 answers · asked by reshuorange 1

thanks for answers!

2007-06-26 04:35:21 · 6 answers · asked by k_mal116 1

i need this question its important.. thanks alot!

2007-06-26 04:32:29 · 3 answers · asked by k_mal116 1

2007-06-26 04:25:36 · 4 answers · asked by singhbiswas 1

2007-06-26 03:48:10 · 3 answers · asked by lotsaqs?? 1

5 examples of substances which are neutral in nature?

2007-06-26 03:24:10 · 3 answers · asked by cyrusmilley 1

http://s40.photobucket.com/albums/e215/xxs3xp1stolxx/?action=view¤t=Picture4.png

2007-06-26 02:58:54 · 3 answers · asked by Anonymous

http://s40.photobucket.com/albums/e215/xxs3xp1stolxx/?action=view¤t=Picture3.png

2007-06-26 02:57:03 · 5 answers · asked by Anonymous

What is the only element or compound that reacts with Glass and hence cannot be taken in glass containers while proceeding with experiments in Labs??
10 points to the person who gives the right answer!!!!!

2007-06-26 02:52:12 · 4 answers · asked by Anonymous

2007-06-26 01:50:37 · 5 answers · asked by rusyl c 1

what will happen before shaking and after shaking.. and why did this happen?


water and oil~
water and ethyl alcohol~
water and powdered moth balls~
water and salt~

thanks!!:):)

2007-06-26 01:41:36 · 5 answers · asked by Anonymous

please if u know the answer...try to send it as soon as possible...
thanx!

2007-06-26 01:16:04 · 1 answers · asked by Anonymous

2007-06-26 00:32:31 · 3 answers · asked by tel 1

2007-06-25 18:55:26 · 6 answers · asked by DIV 2

1. Sodium atoms can form NA+ ions in terms of electronics explain how a sodium ion, NA+ is formed from a sodium atom.

2. Neon and argon are inert gases, in terms of electron arrangement explain what this statement means

3. In which group of the periodic table would you place sodium.

2007-06-25 17:18:49 · 3 answers · asked by questioneer112 1

i mean the empirical formula i.e:H2O

2007-06-25 16:40:58 · 6 answers · asked by joshua y 1

2007-06-25 16:20:58 · 4 answers · asked by Anonymous

2007-06-25 16:01:44 · 20 answers · asked by satish r 1

Need to lead student in doing the experiment about the properties of acid (simple experiment)... Thanks!

2007-06-25 15:46:17 · 2 answers · asked by xiong 1

2007-06-25 15:19:06 · 6 answers · asked by Anonymous

0.60 g of CCL4 in 430.0 g of benzene.

given information: BP of benzene = 80.1 C, Kb=2.53, Freezing pt=5.5 C, Kf = 5.12

i don't know if the information is necessary, but my book only shows how to calculate the molality of solute dissolved in water...

thanks

2007-06-25 15:11:24 · 4 answers · asked by Ganbatteru 3

Just need a good explanation to see where I am going wrong.

0.05 M CH3COOH

So, CH3COOH + H2O --><-- CH3COO- + H3O+

Ka = [CH3COO-][H3O+] / [CH3COOH]

But isn't [H3O+] in this case (10-5) assumed to be 0 for these calculations? Is there a way to do this without using [H3O+] = sqrt(Ka*conc.Ha) ?

I was trying to figure out if I could calculate it using the Ka formula above.

2007-06-25 14:37:06 · 2 answers · asked by ScienceNut 2

2007-06-25 12:15:10 · 2 answers · asked by bilmotie 2

Are the two potassiums different?

2007-06-25 12:07:28 · 15 answers · asked by Babbie 1

This is a chemistry question, i am failing the class please help! a hydrogen atom only has one electron so why would the above happen? Thanks for your input

2007-06-25 12:05:23 · 2 answers · asked by Bree 2

Are the two potassiums different?

2007-06-25 11:54:15 · 8 answers · asked by Babbie 1

2007-06-25 10:25:32 · 4 answers · asked by Anonymous