smelnizzle
Member
the answer is D, and i have no idea why or how. D:
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An explanation for a MC answer, pls :) (1 Viewer)
- Thread starter smelnizzle
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brenton1987
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The colourless bar extends from pH 0 to pH 8.6 while the magenta bar extends from pH 10 to pH 14. So the region of colour change extends from pH 8.6 to pH 10.
The pH scale is logarithmic so the gap between pH 9 and pH 10 translates to a 10 fold change in proton concentration. The gap between pH 8 and pH is a 100 fold concentration. So already option A and B are wrong.
The colour change has a range of 1.4 pH units.
101.4 = 25 (D)
smelnizzle
Member
ah!
thanks guys - both ways make sense.
thanks guys - both ways make sense.