All categories - 21 April 2007

1) Arsenic acid H3 As O4 is a tribasic acid. 25.0ml of a solution of the acid requires 35.7ml of a solution of sodium hydroxide of concentration 0.100 mol/L for neutralization. What is the concentration of the acid? and give the the equation for it.


2) A piece of iron wire weighs 0.2756g. It is dissolved in acid, reduced to the Fe2+ oxidation state, and titrated with 0.0200 mol/L potassium dichromate solution. What is the percentage purity of the iron wire? Use half-equations


3) 225g of iron wire was treated with sulphuric acid to convert it to Fe2+. All of the Fe2+ was placed in a 250ml flask and the solution made up to the mark with water. 25ml of this solution was titrated with a 0.00185 mol/L solution of potassium dichromate(VI). The volume required was 31.0ml. Calculate the percentage of iron in the wire. Use half equations.

2007-04-21 15:23:15 · 1 answers · asked by studentofscience 1 in Chemistry

I have a small amount of milky/clearish liquid coming from my breast. I didnt think I would have any breast discharge this early..and its my first baby..
Is it normal?

2007-04-21 15:23:06 · 12 answers · asked by yummy♥mummy 4 in Pregnancy

Its just that some women(like me)who usually prefer savoury foods to sweet,turn to cheese for their "FIX"instead of chocolate at that time of the month.Do any of you agree.

2007-04-21 15:23:02 · 10 answers · asked by patsy 3 in Other - Food & Drink

2007-04-21 15:22:52 · 9 answers · asked by famousnare 1 in Aircraft

2007-04-21 15:22:41 · 34 answers · asked by Julia Sugarbaker 7 in Polls & Surveys

Just a wild thought, everybody is talking about climax changes bla bla bla...anybody have a more constructive thoughts of easing the really problems ahead....
Living a simplier life would help though, less papers, less co2, less wasting our earth resources would helps but something, thinking out of the box might be a fun thing to do...you never know....need more experts' view on this.

2007-04-21 15:22:30 · 6 answers · asked by WL Tan 2 in Earth Sciences & Geology

2007-04-21 15:22:27 · 89 answers · asked by glasgow girl 6 in Polls & Surveys

i just wanna know all differences

2007-04-21 15:22:14 · 18 answers · asked by cuttie pie 2 in Women's Health

2007-04-21 15:21:39 · 23 answers · asked by Papa 7 in Polls & Surveys

would you still like me

2007-04-21 15:21:22 · 49 answers · asked by amberharris20022000 7 in Polls & Surveys

Which photoshop is better? CS2 or CS3? Which would you get if price wasn't an issue. Thanks and please give some reasons.

2007-04-21 15:20:56 · 5 answers · asked by John 4 in Software

which of the following are strong acids and how do you know? which are the weak acids?

H2SO4, HI, HF, H3PO3, HNO3

2007-04-21 15:20:43 · 6 answers · asked by Anonymous in Chemistry

2007-04-21 15:20:17 · 14 answers · asked by Anonymous in Cooking & Recipes

2007-04-21 15:20:12 · 5 answers · asked by Anonymous in Other - Health

2007-04-21 15:19:51 · 58 answers · asked by ? 6 in Polls & Surveys

2007-04-21 15:19:42 · 24 answers · asked by Haiku 1 in Polls & Surveys

Someone has told me that you can spray somthing on the vacuum lines but I cant remember what. Can anyone help me?

2007-04-21 15:19:39 · 8 answers · asked by Joey C 1 in Maintenance & Repairs

I'm torn between two occupations that I want to do. I'm a sophomore in High School, and I enjoy drafting/architecture, and I defiantly enjoy drawing. So I would love to make childrens cartoon, along the lines of things like Pokemon, and things that a younger audience would adapt to. Dorky, yes. But I just feel like I would love to do something like that.

I'm pretty sure if I did become an architect, that I would make better money. But I dont know about the financial status of being a professional cartoonist. If anyone knows which one you think would be a better occupation please reply with some adivce for me.

2007-04-21 15:19:32 · 5 answers · asked by Tyler 1 in Drawing & Illustration

I've noticed over the last several weeks that Dude 1988 asks a lot of questions. What's especially telling is that he rarely chooses a best answer for the questions he asks. Then he comes back later and asks similar questions. Not only that but he keeps switching his political affiliation. Is he learning ANYTHING ???????????????????????????????????

2007-04-21 15:19:27 · 6 answers · asked by ? 6 in Politics

2007-04-21 15:19:25 · 18 answers · asked by Ti 7 in Religion & Spirituality

Mine was my 11th the year I got a horse for my birthday. Boy that was along time ago now I feel old.

2007-04-21 15:19:16 · 21 answers · asked by shepp959 3 in Polls & Surveys

I think the worst pick-up line to me was this:

Him: "Hi sexy"
Me: "Hey"
Him: "How you doin'?"
Me: "I'm fine"
Him: "I can see your fine but other than that how you doin'?"

Some guys just don't have NO GAME!

2007-04-21 15:19:13 · 12 answers · asked by me 2 in Singles & Dating

in the acid-base reaction CN^- + h2O > products, h2O acts as an ________ and one of the products is ________.

1: an acid or a base
2: OH^- or H3O^+

2007-04-21 15:19:12 · 1 answers · asked by Anonymous in Chemistry

2007-04-21 15:19:09 · 14 answers · asked by Anonymous in Religion & Spirituality

2007-04-21 15:19:04 · 18 answers · asked by ? 1 in Singles & Dating

I'm going off to either NC state or UNC charlotte (need help deciding) and my mother is buying a car, but i can't decide if I should get the Honda or Infinite. Which would be the best choice in maintence, longativity, and cheap repairs.

2007-04-21 15:19:04 · 3 answers · asked by jigm1 3 in Buying & Selling

2007-04-21 15:19:03 · 11 answers · asked by Anonymous in Comics & Animation

2007-04-21 15:19:00 · 9 answers · asked by ? 2 in Law & Ethics

I have this poem below its called "My Father in the Navy: A childhood memory" y Judith Ortiz Cofer" I totally dont understand this poem, can somebody translate it for me? Thank you I really appreciate it.



Stiff and immaculate
In the white cloth of his uniform
and a round cap on his head like a halo,
he was an apparition on leave from a shadow- world
and only flesh and blood when he rose from below
the waterline where he kept watch over the engines
and dials making sure the ship parted the waters
on a straight course.
mother, brother and I kept vigil
on the nights and dawns of his arrivals,
watching the corner beyon the neon sign of a quasar
for the flash of white our father like an angel
heralding a new day.
His homecoming were the verses
we composed over the years making up
the siren's song that kept him coming back
from th bellies of iron whales
and into out nights
like the evening prayer.

2007-04-21 15:18:56 · 8 answers · asked by Kevin L 1 in Homework Help