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his is the method I used:

2.0312 g of chalk / suspended in 100cm3 of water and 50cm3 of HCl(excess). Mixture is boiled for 1 minute then cooled and then its titrated against NaOH.

the Molarity of the HCL is 0.9931
the Molarity of the NaOH is 0.9931

the result of the titration is 9.9 (NaOH in the buirette and the excess HCl in the flask)

My calculation:

HCl(excess) + NaOH ---> xxxxxxx

moles of NaOH = (0.9931x10.00)/1000 = 9.931x10^-3 moles
1:1 ration with HCl so moles of HCl = 9.931x10^-3 moles

Moles of the HCl used at the start of the experiment = (0.9931x50.00)/1000 = 0.49655 moles

Amount of HCl used in the equation below = 0.49655 - (9.931x10^-3) = 0.039724 moles

CaCO3 + 2HCl ------> xxxxxxxx + excess HCl


its a 1:2 ration so 0.039724 / 2 = 0.019862 moles of CaCO3
Mr of CaCO3 = 100.087
Mass of CaCO3 = 100.087 x 0.019862 =1.988g
therefore Percentage w/w is 97.87%

does it look right?

2007-10-10 06:58:27 · 4 answers · asked by 421 4 1 in Chemistry

Also, visitors from overseas (Huckabee's point) and people taking money under the table will be paying into the tax revenue just by spending money.

Would I not buy a new car vs keeping the one that is paid for and so forth?

2007-10-10 06:58:24 · 13 answers · asked by Chi Guy 5 in Politics

2007-10-10 06:58:24 · 11 answers · asked by Yanks4Life23519 7 in Polls & Surveys

God rested on the Sabbath, before there were humans, before there were Jews, and before the Ten Commandments were given to the Israelites by Moses, so ALL people should observe the Sabbath, right?

Why do Christians fail to honor the Sabbath day? Which is Saturday.

2007-10-10 06:58:17 · 22 answers · asked by oysterchowder2004 3 in Religion & Spirituality

Is there a piece of music by BACH known as "The Black Forest"?

2007-10-10 06:58:07 · 2 answers · asked by babydoll22 2 in Classical

2007-10-10 06:58:06 · 23 answers · asked by higgs2boson 3 in Baseball

I get out of my car and I see two little dents and several scratches on the right side of my car, I don't think they were there before. My mind flashes back to pulling forward out of the school parking spot, I remember turning a *tad* early and I thought I was still able to clear everything. I saw a large dent on the front left of the car next to me in the mirror but I figured it was from a previous accident. I would have felt or heard something if I actually hit the car, right?

How much trouble would I be in if I did hit it and somebody saw, or they figure out who did it? Is it best to turn myself in in some way even if I not sure that I hit anything?

2007-10-10 06:58:02 · 4 answers · asked by PhoneStraw 1 in Safety

I want to make mixed cds from the cds that I own. I have a laptop macbook, is there software I need to buy? Or I am better off just buying a cd recorder?

2007-10-10 06:58:01 · 2 answers · asked by matters 2 in Music & Music Players

Installed Money on my laptop, and currency in UK GB Pound, but when installing same software on cousins PC, currency shows in dollars. Went into regional settings and language on her PC and changed to English UK, but after reinstalling Money on her PC, US dollars are the still the currency.

Can anyone help please, is there a real techie around who can sort this out

2007-10-10 06:57:56 · 1 answers · asked by DAVID W 1 in Software

Which game show would you want to be a contestant on (and it doesn't have to be anything current, you can reach back to the oldies).
I would love to have been on "Press Your Luck." I just loved those whammys.

2007-10-10 06:57:49 · 12 answers · asked by ♥Erica♥ 4 in Polls & Surveys

The word skeeve means something that grosses you out. Now we all skeeve things like boogers, dog turds, used tampons.

What is it that you skeeve the most that most people don't ?

True Example: I really skeeve Spaghettios.

2007-10-10 06:57:38 · 9 answers · asked by Bagmoore 2 in Words & Wordplay

My son will be 1 month old tomorrow. He is a 35 weeker. For his feeding before he'll only take about 1 ounce to 1 and a half each feeding. I feed every 2 to 3 hours. Now being almost 1 month old he's only taking 2 and half ounce sometimes 3 ounce at each feeding, is this ok or should he be taking more than 3 ounces now?

And also why does he grunt, and moan and makes all this noises like he is pushing? Even when he isn't pooping

2007-10-10 06:57:38 · 9 answers · asked by Anonymous in Newborn & Baby

the only difference is King James ''virson'' replaced the word Jehovah with lord god ,,,and it uses modern english words like 'you'' instead of ''thou art''

as an atheist I do not understand why you would compare it to the book of morman(an entierly different book)and say they made the whole book up and that its a cult(of jesus followers)

intelegent anwsers please

2007-10-10 06:57:24 · 23 answers · asked by Anonymous in Religion & Spirituality

That's right, it's NAME THAT GOD!

For ten whole points, who can tell me the name of THIS god!

-Finnish god of crops
-Gender is ambiguous

More clues will be added every five minutes!

2007-10-10 06:57:20 · 8 answers · asked by Melty Blood 3 in Religion & Spirituality

Who thinks that teenagers should be reading not watching tv and playing with i-pods. I went to a wedding this past weekend and had a conversation with a few young adults. Kids and young adults these day have the intelect of box of paper clips.

2007-10-10 06:57:13 · 16 answers · asked by CSC78 6 in Polls & Surveys

2007-10-10 06:57:04 · 2 answers · asked by martean 1 in Optical

Ok....in the episode, a patient tells House that when he had a car accident, he "died" for a minute and saw "an afterlife", with God/Jesus and everything. House, being an atheist, stuck a knife in an electric socket and died too for over a minute. He was reluctant at first to tell if he "saw anything", but at the end of the episode, revealed he hadnt and that there was nothing. Thoughts??

2007-10-10 06:56:48 · 9 answers · asked by pure&simple 3 in Religion & Spirituality

people add you to thier contact list without asking you first?

2007-10-10 06:56:37 · 5 answers · asked by Anonymous in Polls & Surveys

I've seen many white boys have been hanging around with Aisan girls, but less white girls have been with Asian boys. What do white girls think of Asian boys?

2007-10-10 06:56:35 · 5 answers · asked by Anonymous in Other - Cultures & Groups

the girls dresses keep sliding down in the back and their thongs show.

I just think that's so tacky and they need to get a wardrobe person to pick dresses that fit them better.

Just wondered if anyone else has noticed that?

2007-10-10 06:56:33 · 9 answers · asked by Anonymous in Other - Television

Quotes and sayings, funny, famous quotes,thought provoking quotes..please tell me your favourites

2007-10-10 06:56:27 · 8 answers · asked by uk.housewife 2 in Other - Society & Culture

When you hear the term "upset," you automatically think of some sports event that reminds you of the "David defeats Goliath" tale. What sports event do you think of when you hear "upset?"

2007-10-10 06:56:25 · 22 answers · asked by Dr. Semi-Evil 6 in Football (American)

I say a CAMERA is one of many :)~

2007-10-10 06:55:57 · 65 answers · asked by Anonymous in Polls & Surveys

2007-10-10 06:55:55 · 14 answers · asked by memyselfandI 2 in Newborn & Baby

To everyone that claims to be a true Christian, Why do you attend church on Sunday instead of the true biblical sabbath.....Saturday? Why do so many Christians break the 4th commandment every week?

2007-10-10 06:55:52 · 16 answers · asked by Anonymous in Religion & Spirituality

I know that we have to get married before he joins. I want to know how the process works from signing up to after boot camp. Like, when will he find out where he will be stationed after boot camp? Will I move while he is in boot camp or will he go first? We have a 3 year old also, so will we live on base or off base? I would just like to know some general information. Thank you for taking time to read this and I hope someone can help me.

2007-10-10 06:55:42 · 7 answers · asked by Anonymous in Military

What is so scary about this life being all we have? I for one find that it makes life much more precious. There are a lot of people who believe there is a better life after this one... and some of these people believe they can get there by killing people who don't believe what they believe. Most of us would agree that this is wrong, but by believing that taking one life will give you a better, everlasting life, they are devaluing life itself. Similarly, to believe that this life is worthless, just a test or what not, to our "real" lives, devalues life just the same.

There is so much more to touch on in this topic but i will leave it at this. I believe that THIS life has infinite value, simply because it is the only one we get. One shot... much like the one diamond among the miles of coal, infinitely valuable because of it's rarity.

2007-10-10 06:55:26 · 12 answers · asked by ChooseRealityPLEASE 6 in Religion & Spirituality

On 10/5/2007, I had $126.19 on my National City Bank checking account. Past several days I used my National City Bank Card to purchase things and I spent things like $1.05 for drink.. about 10 items with $2.00 or less. I also spent things to purchase that cost me about $20.00 or more for each.

I login my online banking everyday and this morning when I got on, it showed 9 items for overdraft fees for $34.00 each so
total overdraft fees showed as $306.00.

If bank posted things that I purchase in order I purchased
I would only need to pay 1 item for $34.00 but the bank posted
everything from highest amount resulting 9 items of overdraft fees.

I visited my branch office but office manger there is very unfriendly and keep saying that I spent money when I didn't have enough in my account. But that is so wrong because
if they deducted everything from things that I spent first then
I would be overdrawn by that much.

Is there any other way I can get my money back?

2007-10-10 06:55:16 · 8 answers · asked by Carbuying 1 in Personal Finance

I heard if you take a razor blade and rub it on the jeans it will work or cut slices into them.. but that really doesnt create the torn look witht the thrads threw it . .

2007-10-10 06:55:07 · 20 answers · asked by r0ckurface 1 in Fashion & Accessories

http://www.crooksandliars.com/2007/10/10/countdowns-worst-person-in-the-world-2/

2007-10-10 06:55:07 · 23 answers · asked by captain_koyk 5 in Politics

fedest.com, questions and answers