acid & alkaline

[1944screen]

what is acid & alkaline used in making

[Toureman]

Making what?

[gen2]

Salt and Water

[dundurn]

sponge cakes - sodium bicarbonate and tartaric acid combine to create the carbon dioxide that makes a sponge 'light'.

I've done my bit - only 999,999 to go

[chakka35]

And the next one, dundurn, is Alka-Seltzer. Only 999,998 to go now.

[solera]

put your question into google and stand by to read for a couple of weeks

[theprof]

Or try looking at gen2's answer again.