Forensics C

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samlan16
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Re: Forensics C

Postby samlan16 » March 15th, 2015, 4:26 pm

Here's one: find the Rf of black ink comprised of red ink that traveled 2.4 cm and blue ink that traveled 2.9 cm.
Rf would be 0.8 and 0.967.
Whoops, I meant 3.0 cm. Correct.
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Re: Forensics C

Postby boomvroomshroom » March 15th, 2015, 6:37 pm

Oh, okay! Cool, so I guessed right. :)

Okay, so...on a mass spec, what do you call a) the rightmost peak, and b) the tallest peak?

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Re: Forensics C

Postby samlan16 » March 17th, 2015, 11:13 am

Oh, okay! Cool, so I guessed right. :)

Okay, so...on a mass spec, what do you call a) the rightmost peak, and b) the tallest peak?
Rightmost= molecular ion mass; tallest= relative molecular mass/ relative formula mass
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Re: Forensics C

Postby samlan16 » July 31st, 2015, 8:55 am

Well, it's been a while since anyone posted on this question marathon, so...

How can you tell the difference between sodium carbonate and sodium bicarbonate?
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Re: Forensics C

Postby pikachu4919 » August 1st, 2015, 2:54 pm

Well, it's been a while since anyone posted on this question marathon, so...

How can you tell the difference between sodium carbonate and sodium bicarbonate?
they have different pH values. Na2CO3's is 10 and NaHCO3's is 8.
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Re: Forensics C

Postby samlan16 » August 1st, 2015, 3:35 pm

Well, it's been a while since anyone posted on this question marathon, so...

How can you tell the difference between sodium carbonate and sodium bicarbonate?
they have different pH values. Na2CO3's is 10 and NaHCO3's is 8.
Correct! Please post the next question.
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Re: Forensics C

Postby pikachu4919 » August 4th, 2015, 3:52 pm

How can one make sure a flame test result is or isn't actually yellow?
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Re: Forensics C

Postby samlan16 » August 4th, 2015, 6:27 pm

How can one make sure a flame test result is or isn't actually yellow?
Look at the flame with cobalt blue glass to filter out any orange/ yellow light from the flames.
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Re: Forensics C

Postby pikachu4919 » August 4th, 2015, 8:05 pm

How can one make sure a flame test result is or isn't actually yellow?
Look at the flame with cobalt blue glass to filter out any orange/ yellow light from the flames.
yep! your turn!
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Nationals 2016 ~ 4th place Forensics


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Re: Forensics C

Postby samlan16 » August 5th, 2015, 8:19 am

Suppose that you are given a powder which burns red in a standard propane flame. What is the cation in that compound?
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