Any Chemistry Experts? I need help

[Zephyr]

is the formula for sodium hydrogen carbonate NaHCO3?

and sodium carbonate Na2CO3?

[lammer]

NaHCO3

Na2CO3

so answer is yes and yes.

[Zephyr]

also err i suck at chem but i have this lab final and i dont know jack squat and it suppose to be easy

"Put a few drops of universal indicator in a 10 mL of 1 M sodium hydrogen carbonate. Stir. Similarly treat 10 mL of 1 M sodium carbonate solution. Gently boil both solutions for a few minutes and then let them cool. Explain why the colors did or did not change."

is this an acid and base test? i serioulsy have no clue..

no other directions, just a complete lab write up from this small directions and actual lab.

[Davetronz]

Run like hell Zeph! Run like hell!
HAHAHAHAHAAH my final mark on Chem 30 was 26%, I opted for the school not to send in my mark and not to take the diploma, it was the ONLY course I have ever failed.

[Stratus_Power]

heh yeh that should be an acid-basic reaction :P somethign w/ the equilibrium.. the indicator is probably for pH lvl.
sorry i cant help you more rit enow, my head is full of biology since my final is in less than 12 hours.

[Dope Dealer]

Originally posted by TurboDSM
Run like hell Zeph! Run like hell!
HAHAHAHAHAAH my final mark on Chem 30 was 26%, I opted for the school not to send in my mark and not to take the diploma, it was the ONLY course I have ever failed.

I thought it was impossible to fail a course at Carroll?

I got 75% in Chem, but I don't really remember anything right now. I only remember how to balance equations.

[kaput]

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[bksze]

Originally posted by Zephyr
also err i suck at chem but i have this lab final and i dont know jack squat and it suppose to be easy

"Put a few drops of universal indicator in a 10 mL of 1 M sodium hydrogen carbonate. Stir. Similarly treat 10 mL of 1 M sodium carbonate solution. Gently boil both solutions for a few minutes and then let them cool. Explain why the colors did or did not change."

is this an acid and base test? i serioulsy have no clue..

no other directions, just a complete lab write up from this small directions and actual lab.

k from my limited memory of chem30 taken 3 years ago . . . here are some points that may help you out

- sodium hydrogen carbonate may be an acid as it contains hydrogen
- sodium carbonate solution on the other hand should be a base
- you boil both solutions in order to speed up the reaction
- depending on the indicator used, it will change colors to indicate a basic solution or change colors to indicate a acidic solution
- i'm assuming the most common indicators would test for the presence of hydrogen, thus resulting in the solution being acidic
- therefore using the following assumptions, the indicator that you are using is indeed testing for the presence of hydrogen, the color will change when added to the acidic solution (sodium hydrogen carbonate) because there is a positive reaction between hydrogen and whatever chemical the indicator is using and there should be no color change in the reaction between the indicator and the basic solution (sodium carbonate) because of the lack of the presence of hydrogen

of course, you could totally reverse this entire reaction around depending on your indicator

that should be a good start for you, mind you, i don't have the greatest memory in the world so i may be off haha

[kaput]

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[Zephyr]

oh thx guys!