Voltametre troubles

[sarahj]

I know this probably seems like a really silly question but when I use my voltameter I cant seem to collect enough hydrogen to make a "pop". As you can understand the students are very disappointed :( Am I doing something really stupid? The hoffmans voltameter is literally brand new!

[Lyn]

What strength H2SO4 are you using? We have used 1M and then added a few drops of Conc. H2SO4 just to give it a bit of a zing. Or you could try a slightly stronger solution. The kids are never told that there is anything other than water in the voltameter. As long as you get the right result and the right noisy pop to keep them happy.
Lyn.

[Labbie]

We use 2M Sulfuric Acid

[dime]

We use 2M Sulfuric as well.

[MariaC]

We use a squirt ( very scientific) of 6M, but add it to the distilled water and stir BEFORE you add to voltameter! I was adding it to the receptacle area, and it wasn't producing any bubbles, but if mixed thoroughly in the water no problems!

[sarahj]

I am getting bubbles no problems with the 1M but im not getting the 'Pop' when I put the match over the hydrogen. Im so confused!

[sarahj]

Hurrah. After 5 goes I have heard the magic pop!