Magnesium metal reacts with HCl ....(PLZ ..HELP NEEDED)?

Question

Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.015-g sample of Mg metal is added to 50.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many g of H2 are formed?

THX A LOT FOR HELPIN ME..I REALLY APPRECIATE IT GUYSS! IT'S DUE TOMORROW...N I HAVE NO CLUE WHT TO DO!!

Answer 1

1.015 g Mg = 1.015 g/ 24.32 g/mole = 0.04174 moles of Mg
50.0 mL of 4.00 M HCl = 0.0500 L x 4.00 moles/liter = 0.200 moles
Mg + 2 HCl --> H2 + MgCl2
0.04174 moles of Mg requires 2x0.4174 moles of HCl or 0.08348 moles HCl.
You have an excess of HCl so Mg is the limiting reagent.
0.04174 moles of Mg will produce 0.04174 moles of H2
0.04174 moles H2 x 2.016 g/mole = 0.0842 g H2.

Answer 2

those are all redox reactions. Copper did no longer react because of the fact this is the only of those metals that's way less energetic than hydrogen. whilst HCl dissociates interior the answer, electrons from the metals are transferred to the hydrogen ions, and hydrogen gas is liberated....the metals exchange into aqueous answer aspects. substitute X for the metals, and all the equations are comparable to long as Iron exchange into iron (II). 2HCl (aq) + X (s) -----> Hsubscript2 (g) + Xsuperscript2+ (aq) + 2Cl- Chlorine could be left out from the two aspects of the equation because of the fact's a spectator ion...the internet ionic equation is 2H+ (aq) + X (s) -------> Hsubscript2 (g) + Xsuperscript2+ the place X is Zn, Mg, or Fe

Answer 3

First set up the balanced equation:

Mg + 2 HCl >>> MgCl2 + H2

Now determine limiting reagent (which will run out first)

Moles of Mg = 1.015g/24.3g/mol = 0.0418mole

Moles HCl = 0.050liter/4.00mol/liter = 0.200 moles

So, Mg runs out first.

From the balanced equation, we can see for each mole of Mg used, one mole of hydrogen gas is formed.

So 0.0418 moles Mg produces 0.0418 moles hydrogen (gas)

Note: we are interested in the weight of 0.0418 moles of hydrogen GAS, which is H2 not H!

0.0418mol x 2.016g/mol = 0.843g

Answer 4

First off, you want to write out the reaction:

Mg + 2HCl(aq) ----> 2Cl[-] + Mg[2+] + H2

Always write out the reaction first, and make sure it's balanced.

Now, let me break it down for you......

What is the mass of one mol of Mg?

How many moles of Mg are in 1.015g?

Each mole of Mg produces how many moles of H2?

What is the mass of one mole of H2?

Good luck,
~W.O.M.B.A.T.

Answer 5

cool, you doing this on capa system? LOL!