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To prepare a 1% phenolphthalein solution in 2000mL, you would need to dissolve 20g of phenolphthalein in 2000mL of solvent (usually water or alcohol). This will result in a 1% solution by weight/volume. Remember to wear appropriate personal protective equipment and handle chemicals with care.
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What is phenolphthalein molecular weight?
The molecular weight of phenolphthalein is approximately 318.28 g/mol.
How do you prepare phenolphthalein indicator for titration?
To prepare phenolphthalein indicator for titration, dissolve phenolphthalein powder in ethanol or a 1:1 mixture of ethanol and water to make a concentration of around 1% w/v. This solution can then be added dropwise to the titration flask to detect the endpoint of the titration based on the color change.
What does Phenolphthalein indicate?
Phenolphthalein is a pH indicator used in acid-base titrations. It changes color from colorless to pink as the pH of the solution goes from acidic to alkaline. It is commonly used to determine the endpoint of titrations involving strong acids and strong bases.
How much phenolphthalein indicator should be used?
Typically, 1-2 drops of phenolphthalein indicator are sufficient to use in an acid-base titration experiment. It is important not to use too much indicator, as it can affect the accuracy of the titration results.
How will you prepare 1 percent naoh?
To prepare a 1% NaOH solution, you can mix 1 part of NaOH (sodium hydroxide) with 99 parts of water by weight. For example, to prepare 100 mL of 1% NaOH solution, you would dissolve 1 gram of NaOH in 99 grams of water. Remember to always add NaOH to water slowly while stirring to avoid splattering and heat generation.
