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Why is sodium carbonate added to solution before Benedicts test is performed?
Sodium carbonate is added to increase the pH of the solution.
What do you observe when red litmus is added to a solution of sodium sulphate?
Sodium sulfate solution is neutral; the red litmus is purple.
Substances acts to stabalize the pH of the solution?
Buffer solutions work to stabilize the pH of a solution by resisting changes in pH when acids or bases are added. This is achieved by the presence of a weak acid and its conjugate base (or a weak base and its conjugate acid) in the solution, which can react with any added acid or base to prevent drastic changes in pH.
What happened to the color of bromothymol blue turn when HCI and NaOCI are added?
When HCl is added to bromothymol blue, the solution turns yellow due to the increased acidity. When NaOCl (sodium hypochlorite) is added, the color changes to green or blue, indicating the basic pH of the solution due to the formation of hypochlorous acid.
What happen when sodium hydroxide is added drop wise to a solution containing phenolphthalein?
When sodium hydroxide is added dropwise to a solution containing phenolphthalein, the solution will initially remain colorless. Once enough sodium hydroxide has been added to make the solution basic, the color will change from colorless to pink or purple, indicating the presence of hydroxide ions. Phenolphthalein is a pH indicator that changes color in the presence of a base.
Why is sodium carbonate added to solution before Benedicts test is performed?
Sodium carbonate is added to increase the pH of the solution.
What do you observe when red litmus is added to a solution of sodium sulphate?
Sodium sulfate solution is neutral; the red litmus is purple.
Buffers tend to prevent dramatic changes in the pH when are added to a solution?
Buffer solutions tend to prevent dramatic changes in the pH of a solution when a weak acid and its conjugate base are added. An example of a buffer solution is blood.
When silver nitrate solution was added to your product what did you observe?
If chloride is present silver chloride with get precipitated..
Why Na2CO3 is added to solution before Benedicts test is performed?
Na2CO3 is added to the solution before the Benedict's test to create an alkaline environment, which helps to stabilize the blue copper (II) ions in the Benedict's reagent. This stabilization is important for the detection of reducing sugars, as the copper (II) ions must be reduced to form a red precipitate in the presence of reducing sugars.
A solution that resists changes in pH when H plus or OH- ions are added to it is called what?
A solution that resists changes in pH when acids or bases are added to it is known as a buffer solution. Buffers are able to neutralize added acids or bases by absorbing or releasing H+ ions to maintain a relatively constant pH.
How can one determine the buffer capacity of a solution?
Buffer capacity of a solution can be determined by measuring the amount of acid or base that can be added to the solution before the pH changes significantly. It is calculated by dividing the amount of added acid or base by the resulting change in pH. A higher buffer capacity indicates the solution can resist changes in pH more effectively.
A solution that resists changes in pH when limtied amounts of acids or bases are added?
A buffer solution is a solution that resists changes in pH when limited amounts of acids or bases are added. Buffers are typically composed of a weak acid and its conjugate base (or a weak base and its conjugate acid) which can react with added acids or bases to maintain a relatively constant pH.
If phenolphthalein is added to a solution and it turns pink what is the pH of the solution?
The pH of the solution is above 8.2. Phenolphthalein changes color from colorless to pink in the pH range of 8.2 to 10.0.
How does a buffer help a solution maintain pH levels?
A buffer helps a solution maintain pH levels by resisting changes in pH when an acid or base is added. It does this by containing a weak acid and its conjugate base, which can react with any added acid or base to prevent drastic changes in pH.
What would you observe if astatine solution is added to sodium bromide solution?
When astatine solution is added to sodium bromide solution, a reaction is likely to occur where astatine displaces bromine to form astatide ions. This would result in the formation of astatide ions in solution and sodium bromide precipitating out as a solid, which can be observed as a color change or cloudy appearance in the solution.
What colour does universal indicator change to Hydrochloric acid is added?
Universal indicator changes to red/orange when hydrochloric acid is added, indicating that the solution is acidic.
