CH-128
pH scale
Chemistry · Secondary 3 · Hard · pH scale
A student measures the pH of four solutions using universal indicator.
W: pH 2
X: pH 6
Y: pH 8
Z: pH 13
Which statement about their acidity or alkalinity is correct?
W: pH 2
X: pH 6
Y: pH 8
Z: pH 13
Which statement about their acidity or alkalinity is correct?
- W and X are alkaline; Y and Z are acidic.
- W is weakly acidic; Z is weakly alkaline.
- W is strongly acidic; X is weakly acidic; Y is weakly alkaline; Z is strongly alkaline.
- W and Z are neutral; X and Y are acidic.
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