[Awgdawg]

I'm having trouble trying to find quick answers for these questions:

1: 10g sample of an oxide is heated in a stream of pure hydrogen forming 1.26g of water.
a)Determine the percentage copper in the compound
b)Determine the empirical formula of the copper oxide. Name it.

2: Nonprescription antacids may contain MgO, Mg(OH)2, or Al(OH)3.
a) Write a chemical equation for the neutralization of hydrochloric acid by each of these substances.
b) Which of these substances will neutralize the greatest amount of .1 M HCL per gram?

[Arkcon]

I'd like to welcome you, Awgdawg:, the the Chemical Forums, but I'd like to ask you to read the Forum Rules{click}.  We like to help you learn to help yourself.  Can yu begin to show us your attempt?

[Awgdawg]

So after waiting a while, I was able to come up with an answer to #1 but #2 is still questionable.

For part a I was able to come up with with the 3 equations:

2HCl + MgO    MgCl₂ + water

Mg(OH)₂ + 2HCl    MgCl₂ + 2water

Al(OH)₃ + 3HCl    AlCl₃ + 3water

After this part, I have trouble finding the greatest amount of .1 M HCl per gram. I first look at the ratios between the acid and the antacid. I find the ratios (1:2) (1:2) (1:3). From this result I'm looking at the Aluminum hydroxide as the answer. I read further into the question and says," ... greatest amount of .1 M HCl per gram." At this point I don't know what equation to use. I'm not sure if the .1 M HCl is redundant or not, or if I put the moles of HCl over each equations' respective masses of the antacids to find an answer.

[Borek]

After this part, I have trouble finding the greatest amount of .1 M HCl per gram

How much HCl can be neutralized by 1 gram of MgO?

How much HCl can be neutralized by 1 gram of Mg(OH)₂?

Which can neutralize more HCl per 1g?

What about Al(OH)₃?

10g sample of an oxide is heated in a stream of pure hydrogen forming 1.26g of water.

How many moles of oxygen reacted? What is mass of this oxygen?