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Anonymous users2024-02-08First, the nature is different.
1. Phenolphthalein. Alkalinity: consists of all hydroxide ions and half carbonate in the water.
content, the alkalinity is determined.
2. Total alkalinity: the total amount of substances in water that can neutralize with strong acids.
2. Different identification methods.
1. Total alkalinity: methyl orange.
As an indicator, titrate with a standard solution of hydrochloric acid or sulfuric acid until pH.
The stoichiometric point A, the solution changes from yellow to orange-red, and the results obtained by the titration are stopped.
2. Phenolphthalein alkalinity: use phenolphthalein as an indicator to titrate the endpoint (determine alkalinity. Usually with methyl red.
Endpoint alkalinity.
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Anonymous users2024-02-07Phenolphthalein alkalinity: This alkalinity is caused by the total hydroxide ion and half carbonate content in the water. Phenolphthalein was used as an indicator to titrate the endpoint (determination of alkalinity. It is usually used in combination with methyl red endpoint alkalinity.
Total alkalinity: refers to the total amount of substances in the water that can accept [H+], that is, neutralize with strong acids.
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Anonymous users2024-02-06Simply put, phenolphthalein alkalinity refers to the amount of carbonate in water, and the total alkalinity includes the amount of carbonate, bicarbonate, or hydroxide.
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Anonymous users2024-02-05Phenolphthalein is a weak organic acid with a colorless lactone structure in the solution of pH and a red quinone structure at pH >.
The discoloration range of phenolphthalein is that phenolphthalein can only detect alkalis and not acids.
Its alkalinity has a weak effect on the total alkalinity, and its alkalinity is generally not considered when used as an indicator.
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Anonymous users2024-02-04With phenolphthalein. Alkalinity measured as an indicator.
It is called phenolphthalein alkalinity, which is denoted by p; With methyl orange.
The alkalinity measured as an indicator is called methyl orange alkalinity, which is expressed by m, and is also called total alkalinity. The relationship between phenolphthalein alkalinity P, methyl orange alkalinity M and the contents of OH—, CO32—and HCO3—in the early water and land is as follows: the relationship between P and M.
Coarse ions are present in the water.
The amount of each ion.
oh—co32—
hco3—m=p
oh—p=mm＜2p
oh—、co32—
2p—m2（m—p）m=2p
co32—m（=2p）
m Rock Si Gao 2p
co32—、hco3—
2pm—2p
p=0HCO3—Hope.
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Anonymous users2024-02-03First, the nature is different.
1. Phenolphthalein alkalinity: caused by all hydroxide ions and half carbonate content in the water, the alkalinity is determined.
2. Total alkalinity: the total amount of substances in water that can neutralize with strong acids.
2. Different identification methods.
1. Total alkalinity: take methyl orange as an indicator, titrate with a standard solution of hydrochloric acid or sulfuric acid until the stoichiometric point A of the pH value, the solution changes from yellow to orange-red, and the results obtained by the titration are stopped.
2. Phenolphthalein alkalinity: use phenolphthalein as an indicator to titrate the endpoint (determine alkalinity. It is usually used in combination with methyl red endpoint alkalinity.
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Anonymous users2024-02-02First, the nature is different.
1. Phenolphthalein alkalinity: It is derived from all hydroxide ions and half of the carbonate content in the water, and the alkalinity is determined.
2. Total alkalinity: the total amount of substances in water that can neutralize with strong acids.
2. Different identification methods.
1. Total alkalinity: take methyl orange as an indicator, titrate with a standard solution of hydrochloric acid or sulfuric acid until the stoichiometric point of pH value is point A, the solution changes from yellow to orange-red, and the results obtained by titration are stopped.
2. Phenolphthalein alkalinity: use phenolphthalein as an indicator to titrate the endpoint (determine alkalinity. It is usually used in combination with methyl red endpoint alkalinity.
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Anonymous users2024-02-01Answer: The alkalinity of phenolphthalein is mainly based on the alkalinity of the action.
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Anonymous users2024-01-31Summary. Total alkalinity refers to the sum of the alkalinity that can be produced by all alkaline substances in a certain volume of aqueous solution, which is often expressed in mg L. Relative alkalinity refers to the proportion or percentage of alkalinity produced by an alkaline substance in an aqueous solution in the total alkalinity, which is often expressed as a fraction or percentage.
In other words, relative alkalinity refers to the alkalinity contributed by different kinds of alkaline substances in a single aqueous solution. The concepts of total alkalinity and relative alkalinity are very important, they can reflect the content and composition of alkaline substances in aqueous solution, and are of great significance for water quality monitoring, industrial production and environmental protection.
Total alkalinity refers to the sum of the alkalinity that can be produced by all alkaline substances in a certain volume of aqueous solution, which is often expressed in mg L. Relative alkalinity refers to the proportion of alkalinity produced by an alkaline substance in an aqueous solution to the total alkalinity dispersion or percentage, which is often expressed as a fraction or percentage. In other words, relative alkalinity refers to the alkalinity deficit contributed by different kinds of alkaline substances in a single aqueous solution.
The concepts of total alkalinity and relative alkalinity are very important, they can reflect the content and composition of alkaline substances in aqueous solution, and are of great significance for water quality monitoring, industrial production and environmental protection.
You've done a great job! Can you elaborate on that?
Total alkalinity refers to the sum of the alkalinity that can be produced by all alkaline substances in a certain volume of aqueous solution, which is often expressed in mg L. Relative alkalinity refers to the proportion of alkalinity produced by an alkaline substance in an aqueous solution to the total alkalinity dispersion or percentage, which is often expressed as a fraction or percentage. In other words, relative alkalinity refers to the alkalinity deficit contributed by different kinds of alkaline substances in a single aqueous solution.
The concepts of total alkalinity and relative alkalinity are very important, they can reflect the content and composition of alkaline substances in aqueous solution, and are of great significance for water quality monitoring, industrial production and environmental protection.
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Anonymous users2024-01-30Summary. Total alkalinity refers to the total amount of all basic ions in a solution, including weak and strong bases. Relative alkalinity refers to the comparison of the degree of alkalinity of an alkaline substance in solution with that of a strong base (such as sodium hydroxide), and is usually expressed by the pH value.
The higher the relative alkalinity, the higher the alkalinity of that alkaline substance, and vice versa. Therefore, total alkalinity and relative alkalinity are two different concepts, the former denoting the total amount and the latter denoting the intensity.
Total alkalinity refers to the total amount of all basic ions in a solution, including weak and strong bases. Relative alkalinity refers to the comparison of the degree of alkalinity of an alkaline substance in a solution with the degree of alkalinity of a strong alkali (such as sodium hydroxide), which is usually expressed by pH value. The higher the relative alkalinity, the higher the alkalinity of the alkaline substance, and vice versa.
Therefore, total alkalinity and relative alkalinity are two different concepts, the former denoting the total amount and the latter denoting the intensity.
You've done a great job! Can you elaborate on that?
Total alkalinity refers to the total amount of all basic ions in a solution, including weak and strong bases. Relative alkalinity refers to the comparison of the degree of alkalinity of an alkaline substance in a solution with the degree of alkalinity of a strong alkali (such as sodium hydroxide), which is usually expressed by pH value. The higher the relative alkalinity, the higher the alkalinity of the alkaline substance, and vice versa.
Therefore, total alkalinity and relative alkalinity are two different concepts, the former denoting the total amount and the latter denoting the intensity.
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