So i actually did the lab, but im confused on how i got the answer. First, i kno when they react, Hydrogen gas is produced, and it fizzes. I had magnesium left over and for the amount of grams of the magnesium i had was a negative number and the actual results that my lab teacher had were positive. How is that possible, why, and how come its negative when magnesium was left over?
2007-03-25 12:14:14 · 2 answers · asked by babishbluestar 1 in Science & Mathematics ➔ Chemistry
Sounds like you need to do your equation and math over again. How many grams of Mg did you start with and how many grams of Hyrdrochloric Acid? Hydrogen is released as a gas and MgCl remains as a byproduct.
Actually, you should write out the equation you have been provided with here in your question. I'm not 100% familiar with this reaction, its entirely possible that Oxygen from the air (or any of the other gases in the air) have entered into the chemical reaction and added themselves to the byproducts of this reaction.
2007-03-25 12:23:15 · answer #1 · answered by 2007_Shelby_GT500 7 · 0⤊ 0⤋
you will first have to weigh the Mg separately ,Mx
weigh it again in addition to the contain you will perform the expt in,Mb.
Mb-Mx= mass of Mg
After the experiment.weigh the content including Mg and HCl
Subtract the weigh of container,Mb from the final mass.
then subtract the initial mass of magnesium metal.
That should not be negative.
You might have worked with the mass of the container in addition to the Mg final mass.Go over to see if there was mistake.
2007-03-25 12:26:30 · answer #2 · answered by Phy A 5 · 1⤊ 0⤋