Which of the following is a common laboratory indicator f...
Which of the following is a common laboratory indicator for bases?
Methyl orange
Phenolphthalein
Bromothymol blue
Litmus
Correct answer is B
Phenolphthalein is a common laboratory indicator used to detect the presence of bases in a solution. In its basic form (pH > 8.3), it turns pink or purple, indicating the presence of a base.
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2Cl2(g) + 2H2O(g) 4HCl(g) + O2(g) ∆H° = +115KJ mol-1. In the above equilibrium reaction, a decr...