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As oil is digested why does the solution turn from red to yellow indicating an acid pH?
Wiki User
∙ 12y ago
"Phenol red is a pH indicator that is red in basic solutions and and yellow in basic solutions." (McGraw-Hill Human Bio Lab Manual, 12th ed., pg. 94) The solution was was basic and is now acidic due to digestion, so the phenol red is indicating the change.
Wiki User
∙ 12y ago
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What color is BTB in an acid?
BTB stains hands and clothes. As carbon dioxide is absorbed from the breath into the solution, forming carbonic acid, the solution changes color from green to yellow.
Does calcium chloride and water form hydrochloric acid?
No, they simply form a solution of calcium chloride. This is correct, but one should add that the solution heats up because of the exothermic process involved when water causes the calcium chloride crystals to dissolve; the calcium chloride is dissociated into calcium and chloride ions. However, the question is why does the solution test as an acid when phenol red is added? The red solution turns yellow indicating an excess of hydrogen (hydronium) ions. There is no adequate answer that I could find on the Internet.
How can you tell the difference between an acid and an alkali?
If the solution turns a shade of red, orange or yellow it is an acid. If the solution turns a shade of purple or blue it is an alkaline. if it goes pink the world ends
Carbon dioxide is passed into a solution of bromthymol blue indicator until the acid solution turns yellow A sprig of elodea is placed into yellow solution and it turns blue purpose of experiment is?
carbon dioxide is used during photosynthesis
What is difference between Benedict's Solution and Hydrochloric Acid?
Hydrochloric acid is HCl. Benedict's solution is a solution of sodium citrate, sodium carbonate, and copper sulfate that changes from blue to yellow or red in the presence of reducing sugars, such as glucose. Also called Benedict's reagent.
What color is BTB in an acid?
BTB stains hands and clothes. As carbon dioxide is absorbed from the breath into the solution, forming carbonic acid, the solution changes color from green to yellow.
Does calcium chloride and water form hydrochloric acid?
No, they simply form a solution of calcium chloride. This is correct, but one should add that the solution heats up because of the exothermic process involved when water causes the calcium chloride crystals to dissolve; the calcium chloride is dissociated into calcium and chloride ions. However, the question is why does the solution test as an acid when phenol red is added? The red solution turns yellow indicating an excess of hydrogen (hydronium) ions. There is no adequate answer that I could find on the Internet.
How can you tell the difference between an acid and an alkali?
If the solution turns a shade of red, orange or yellow it is an acid. If the solution turns a shade of purple or blue it is an alkaline. if it goes pink the world ends
Carbon dioxide is passed into a solution of bromthymol blue indicator until the acid solution turns yellow A sprig of elodea is placed into yellow solution and it turns blue purpose of experiment is?
carbon dioxide is used during photosynthesis
Why does adding carbon dioxide to BTB solution cause a color change?
BTB is an acid indicator. by adding carbon dioxide to the solution, it will turn into carbonic acid (a weak acid) turns green in low concentration and yellow in high concentration.
If you mixed an acid and a base and they cancelled what color would it be?
The colour would be yellow on a pH chart as yellow is neutral. By canceling out both the base and acid the solution would be neutralized as long as they have the same concentration.
What does red indicate?
Phenol red indicates for acidic pH. When the red solution turns yellow it means the solution has a low pH. For Example: CO2 dissolves into water and forms carbonic acid which lowers the pH and the solution would turn yellow.
What color will the solution be when it is a weak acid?
the colour will be a yellow, nearly going onto green or a really light orange
What is the reason to test the solution with litmus paper?
To check the pH of the item. Yellow is acid, and red is alkaline, I think.
What is difference between Benedict's Solution and Hydrochloric Acid?
Hydrochloric acid is HCl. Benedict's solution is a solution of sodium citrate, sodium carbonate, and copper sulfate that changes from blue to yellow or red in the presence of reducing sugars, such as glucose. Also called Benedict's reagent.
What is an indicator of an acid?
You can use pH meter(an acid is less than 7units). Red cabbage, strawberry, or cherry solution.(turns yellow with an acid). Blue Litmus Paper(Turns red with an acid). These are some examples of acid indicators.
What is the effect of curd on turmeric solution?
turmeric dissolved in water is treated with citric acid(lemon or juice of any citrus fruit) red color is formed due to the reaction of phenol(in turmeric) with trioic acid present in citric acid
