Dear Mr. Samarasiri,

Please see the 2 X e-mails sent to you today a  short while ago on Titration of an Antacid , along  with 2 X  research papers..

BR,

Cmde

To prepare a phenolphthalein indicator solution for acid-base titration, follow these simple steps. Phenolphthalein is a pH indicator commonly used in titrations because it changes color from colorless to pink as the solution changes from acidic to slightly basic (around pH 8.2 to 10). Here's how you can make a standard solution:

Materials Needed:

• Phenolphthalein powder
• Ethanol (95% or absolute)
• Distilled water
• A dropper bottle or a suitable storage container
• A balance for measuring
• A funnel and filter paper (optional, to filter the solution if not clear)

Preparation Steps:

Remember, the exact concentration of phenolphthalein in the solution is not critical for its role as an indicator in titrations, but the standard 1% solution by weight in ethanol is commonly used for its effective indication range and stability.

l This protocol list might provide further insights to address this issue.