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Explain why during the recrystallization of p-dibromobenzene the turbidity of the hot solution was used as an indicator for the ratio of ethanol to water used?
ethanol alone is not a good solvent for this substance recrystallization and the compound has a very low solubility in hot or cold water.so ethanol and water are mixed together as solvent for crystallization of p-dibromobenzene that is soluble in the hot solvent mixed.so the turbidity of the hot solution shows the good mixture of ethanol and water as solvent.
What else can I help you with?
When doing recrystallization what observations would prompt you to perform hot filtration?
The process of recrystallization typically involves the dissolving of a crude solid in a recrystallization solvent by heating up the mixture. For crystallization to begin the crude solid has to dissolve completely so if it is observed that the crude solid has not completely dissolved a hot filtration step is required to separate the solids that are suspended.
Do Acids turn universal indicator solution yellow or red?
Acids turn universal indicator solution red.
What colour does the univeral indicator turn in ammonia solution?
It depends on the concentration of the ammonia solution as the universal indicator can show a huge variety of colors.
What indicator has no color at all?
phenolphthalien when added to an acidic solution has a colourless indicator. but shows pink colour for basic solution.
How is the pH of a solution is measured using universal indicator?
The pH of a solution is measured using universal indicator by adding a few drops of the indicator to the solution and observing the color change. The color of the solution corresponds to the pH level on the universal indicator color scale, which ranges from red (acidic) to purple (neutral) to blue (basic).
Why there is turbidity when coppper sulfate solution is treated with ammonium hydroxide?
The turbidity is due to the formation of the insoluble copper hydroxide.
How do you make 1000 ntu solution?
To make a 1000 NTU (nephelometric turbidity unit) solution, mix one gram of formazin powder in one liter of distilled water. Allow the solution to stand for at least 24 hours before use to stabilize. This solution can be used to calibrate turbidity meters and assess the turbidity of water samples.
When doing recrystallization what observations would prompt you to perform hot filtration?
The process of recrystallization typically involves the dissolving of a crude solid in a recrystallization solvent by heating up the mixture. For crystallization to begin the crude solid has to dissolve completely so if it is observed that the crude solid has not completely dissolved a hot filtration step is required to separate the solids that are suspended.
What color do neutral solution turn the unniversal indicator?
A neutral solution will turn universal indicator green.
What is the indicator and color change for a positive test for glucose?
Benedict solution is the chemical indicator for simple sugars.
What is the colour of universal indicator solution in a neutral solution?
The Universal Indicator would go green which is pH 7.
Do Acids turn universal indicator solution yellow or red?
Acids turn universal indicator solution red.
How do you prevent immature recrystallization?
To prevent immature recrystallization, ensure that the solvent is added slowly to the solution during recrystallization, use a minimal amount of solvent, and employ a suitable solvent system based on the solubility of the compound. Additionally, controlling the rate of cooling during recrystallization can help prevent premature crystallization of impurities.
What colour does the univeral indicator turn in ammonia solution?
It depends on the concentration of the ammonia solution as the universal indicator can show a huge variety of colors.
What indicator has no color at all?
phenolphthalien when added to an acidic solution has a colourless indicator. but shows pink colour for basic solution.
How you purify salt?
Salt is refined by the filtration of the water solution and repeated crystallization/recrystallization processes.
Obtaining pure salt from rock salt?
Rock salt is ground, dissolved in water, the solution is filtered and this solution is refined by successivelyprocesses of crystallization/recrystallization, to obtain sodium chloride (table salt) 99,99 %; and finally this salt is iodized and some anticaking substances are added.
