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    Okay, the CHEMISTRY exam is in 2days as you might know, and I am confused about something...


    Questions that ask for reagents or chemicals to break or catalyse reactions.

    HOW do I distinguish between when I should use


    HCL or H2SO4?

    & then, how the **** do I know which concentration to use??? Dilute. moderately concentrated or concentrated???


    This is completely puzzling me...



    Any help will be highly appreciated. Cheers!
 
 
 
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