I read some papers about preparing phenolphtalein 0.05%. Add 0.05g phenolphtalein in a beacher and add 50mL ethanol 95% and 50mL distilled water. But I can exchange acohol content (such as 100mL ethanol 60%) and distilled water??? I want to use phenolphtalein indicator for my titration between HCl and NaOH, NaOH and H2C2O4.

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