Question

Please Help Me
One reaction that produces hydrogen gas can
be represented by the unbalanced chemical
equation

Mg(s) + HCl(aq) −-> MgCl2(aq) + H2(g) .
What mass of HCl is consumed by the reac-
tion of 3.64 mol of magnesium?
Answer in units of g
(part 2 of 3)
What mass of MgCl2 is produced?
Answer in units of g
(part 3 of 3)
What mass of H2 is produced?
Answer in units of g

Answer 1

@Mertsj Can you please help me?

Answer 2

You must first balance the equation.

Answer 3

How do i do that? @Mertsj

Answer 4

What does it mean to balance an equation of a chemical reaction?

Answer 5

Both equations have to be balanced equal same amount of number @Mertsj

Answer 6

It means that there must be the same number of atoms of any given element on both sides of the equation.
Why isn't the given equation balanced?

Answer 7

The atoms are unbalanced @Mertsj

Answer 8

Which atoms are unbalanced?

Answer 9

All of them? @Mertsj

Answer 10

How many atoms of Mg are on the left?

Answer 11

Are you there?

Answer 12

One and yes i am @mert

Answer 13

@Mertsj

Answer 14

How many atoms of Mg are on the right?

Answer 15

one @Mertsj

Answer 16

Is the number of Mg atoms on the left equal to the number of Mg atoms on the right?

Answer 17

yes @Mertsj

Answer 18

So is the number of Mg atoms balanced?

Answer 19

Yes they are @Mertsj

Answer 20

So let's move on to the H atoms. How many H atoms on the left?

Answer 21

The H atoms are uneven the left side has one and the right side has two

Answer 22

@Mertsj

Answer 23

So the H atoms are unbalanced.

Answer 24

yes @Mertsj

Answer 25

What about the Cl atoms? Are they balanced or unbalanced?

Answer 26

The CI atoms are balanced @Mertsj

Answer 27

How many Cl atoms are on the left?

Answer 28

1and on the right two but the two is a little one on the bottom like this \[CI _{2}\]

Answer 29

@Mertsj

Answer 30

1 Cl atom on the left and 2 on the right. Is that balanced or unbalanced?

Answer 31

This is the equation
\[Mg+HCI --> MgCI _{2}+H _{2}\]

Answer 32

I would say unbalanced? @Mertsj

Answer 33

\[Mg + HCl \rightarrow MgCl _{2}+H _{2}\]

Answer 34

That is the equation. So we have figured out that there are 2 H atoms on the right and only 1 on the left. The same thing is true for the Cl atoms. How could we fix that and make 2 H on both sides and 2 Cl atoms on both sides?

Answer 35

Add 1 @Mertsj

Answer 36

How about if we put a 2 in front of the HCl on the left. Would that work?

Answer 37

yes i think so? @Mertsj

Answer 38

\[Mg+2HCl \rightarrow MgCl _{2}+H _{2}\]

Answer 39

So is the equation balanced now?

Answer 40

Yes it is balanced @Mertsj

Answer 41

Do you understand what the balanced equation tells you about the number of moles of each compound or element in the equation?

Answer 42

That they are even @Mertsj