CH-1029
pH scale
Chemistry · Secondary 4 · Easy · pH scale
A student measures the pH of four solutions using universal indicator. The colours observed are: W (red), X (orange), Y (green) and Z (purple). Which row shows the correct order of increasing hydrogen ion concentration?
- W, X, Y, Z
- Z, Y, X, W
- Z, X, Y, W
- Y, Z, X, W
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