A solution which is yellow in the presence of alizarin yellow indicator and red in the presence of phenolphthalein, must have a pH which is in what range? Refer to precision of indicators in the picture what is the lowest possible ph and the highest possible ph ?
A solution which is yellow in the presence of alizarin yellow indicator and red in the presence of phenolphthalein, must have a pH which is in what range? Refer to precision of indicators in the picture
what is the lowest possible ph and the highest possible ph ?
Based on the precision of the indicators shown in the picture, alizarin yellow has a pH range of 10.1-12.0 and phenolphthalein has a pH range of 8.0-10.0.
A solution that is yellow in the presence of alizarin yellow indicator indicates that the pH is above 10.1, and a solution that is red in the presence of phenolphthalein indicates that the pH is below 10.0.
Therefore, the pH of the solution must be between 10.1 and 10.0. The range of pH that satisfies both conditions is quite narrow, which means that the solution must be very close to pH 10.1 or 10.0.
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