college chemistry

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which of the following combinations is not suitable for making a buffer?
h3po4 and nah2po4
na2co3 and nahco3
nh4cl and nh3
nah2po4 and na2hpo4
hclo4 and naclo4

  • college chemistry -

    The last one and here's a tip. Don't forget where the shift key is for formulas (and starting a sentence for that matter). na2co3 doesn't mean a thing. CO is different than Co is different than co. Carbon monoxide vs cobalt vs company.

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