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Alkalinity in natural water is primarily caused by the presence of bicarbonate (HCO3-), carbonate (CO3^2-), and hydroxide (OH-) ions. These ions act as buffers, helping to neutralize acids and maintain a stable pH in the water. The concentration of these ions is influenced by geological formations, vegetation, and biological processes in the water body. Overall, they play a crucial role in the chemical balance and ecosystem health of aquatic environments.

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Which ion cause alkalinity?

Alkaline are hydroxides of metals like sodium,potassium and a base substance that accepts protons such as hydroxide ion (OH -) - a negative ion. As a negative ion it accepts the positive ions of H+ and all metals with positive ions to neutral and produce salt and water.


What is the alkalinity of water containing 6 and 40mgl of carbonate and bicarbonate ions respectively?

Please clarify the units of concentration of carbonate and bicarbonate. "mgl" is not a unit of concentration (it's not a unit of anything to my knowledge. To answer this question, you need the concentration of both ions. So either provide the amount of both ions AND the amount of water, or just specify the concentration (in unit of molarity, or moles per liter preferably).


What types of alkalinity?

Alkalinity primarily refers to the capacity of water to neutralize acids and is commonly categorized into three types: bicarbonate (HCO3-), carbonate (CO3^2-), and hydroxide (OH-). Bicarbonate is the most prevalent form in natural water systems, while carbonate becomes more significant at higher pH levels. Hydroxide ions contribute to alkalinity when pH levels are extremely high. Together, these forms help buffer pH changes in aquatic environments.


Alkalinity of water cannot be due to the simultaneous presence of OH CO3 and HCO3 Give reason?

The alkalinity of water is primarily due to the presence of bicarbonate (HCO3⁻), carbonate (CO3²⁻), and hydroxide (OH⁻) ions, which can neutralize acids. However, if CO3²⁻ and HCO3⁻ are present simultaneously without the corresponding acid or base to balance them, they would neutralize each other, leading to a stable pH and effectively reducing the overall alkalinity. In essence, for alkalinity to be significant, these ions must exist in a way that allows them to contribute to acid neutralization rather than cancel each other out. Thus, the concurrent presence of all three ions would not result in high alkalinity.


Why phenol phethaline alkalinity equal to half alkalinity?

Phenolphthalein alkalinity is considered to be half of the total alkalinity because it specifically measures the concentration of hydroxide ions (OH⁻) and bicarbonate ions (HCO₃⁻) in a solution, which are responsible for the initial buffering capacity. Total alkalinity encompasses all buffering species, including carbonate ions (CO₃²⁻) and other forms of alkalinity that contribute to the system's ability to resist pH changes. Since phenolphthalein only accounts for the species that neutralize strong acids to a pH of around 8.3, it typically reflects only a portion of the total alkalinity, hence the halving effect. This distinction is important in understanding the chemical equilibria in aquatic systems and in water quality assessments.

Related Questions

How can I effectively remove alkalinity from water?

To effectively remove alkalinity from water, you can use processes like reverse osmosis, distillation, or ion exchange. These methods help reduce the alkalinity levels in water by removing minerals and ions that contribute to alkalinity.


Which ion cause alkalinity?

Alkaline are hydroxides of metals like sodium,potassium and a base substance that accepts protons such as hydroxide ion (OH -) - a negative ion. As a negative ion it accepts the positive ions of H+ and all metals with positive ions to neutral and produce salt and water.


What are the constituents responsible for the alkalinity of water?

Alkalinity measures the acid neutralizing capacity of the water. The main constituents that are responsible for this measurement are the acids, minerals, salts, and substances that are in the water. Acid rain and pollution are the two main contributors of these things.


Difference between phenolphthalein alkalinity and and total alkalinity?

Phenolphthalein alkalinity measures the hydroxide ion concentration in water, specifically the amount that can be neutralized by strong acids. Total alkalinity, however, measures the water's ability to neutralize acids, including carbonate, bicarbonate, and hydroxide ions. In summary, phenolphthalein alkalinity focuses on the hydroxide ions, while total alkalinity considers a broader range of alkaline substances.


What are the types of alkalinity?

Alkalinity refers to the capacity of water to neutralize acids and is primarily due to the presence of bicarbonate, carbonate, and hydroxide ions. The main types of alkalinity include bicarbonate alkalinity, which is the most common form found in natural waters; carbonate alkalinity, which occurs at higher pH levels; and hydroxide alkalinity, which is less common and typically found in very basic conditions. These types of alkalinity play a crucial role in maintaining pH levels and supporting aquatic life.


What is acidity and alkalinity in H30 and OH?

In aqueous solutions, acidity refers to the concentration of H3O+ ions, which are formed when water molecules accept a proton (H+). Alkalinity refers to the concentration of OH- ions, which are formed when water molecules donate a proton. Acidity and alkalinity are measured on the pH scale, with pH values below 7 indicating acidity and values above 7 indicating alkalinity.


Would you expect the carbonate alkalinity to be higher or lower for temporary hard rather than permanently hard water?

The carbonate alkalinity would be higher in temporary hard water compared to permanently hard water. Temporary hard water primarily contains bicarbonate ions, which contribute to the carbonate alkalinity, while permanently hard water contains other ions, such as sulfate or chloride, which do not significantly contribute to carbonate alkalinity.


What is the difference between alkalinity and pH levels in water quality testing?

Alkalinity measures the water's ability to resist changes in pH, while pH levels indicate the acidity or basicity of the water. Alkalinity is a measure of the buffering capacity of water, while pH is a measure of the concentration of hydrogen ions in the water.


What is alkalinity and how does it affect water quality?

Alkalinity is a measure of the water's ability to resist changes in pH levels. It indicates the presence of bicarbonate, carbonate, and hydroxide ions in water. Alkalinity helps buffer against sudden changes in pH, which can be harmful to aquatic life. High alkalinity levels can lead to increased water hardness and nutrient levels, affecting the overall water quality and ecosystem balance.


What is the initial cause of the dissociation of water molecules into hydrogen and hydroxide ions?

The initial cause of the dissociation of water molecules into hydrogen and hydroxide ions is the breaking of the hydrogen-oxygen bonds within the water molecule due to thermal energy. This process is facilitated by the natural tendency of water molecules to ionize into H+ and OH- ions.


What is the alkalinity of water containing 6 and 40mgl of carbonate and bicarbonate ions respectively?

Please clarify the units of concentration of carbonate and bicarbonate. "mgl" is not a unit of concentration (it's not a unit of anything to my knowledge. To answer this question, you need the concentration of both ions. So either provide the amount of both ions AND the amount of water, or just specify the concentration (in unit of molarity, or moles per liter preferably).


Alkalinity of water cannot be due to the simultaneous presence of OH CO3 and HCO3 Give reason?

The alkalinity of water is primarily due to the presence of bicarbonate (HCO3⁻), carbonate (CO3²⁻), and hydroxide (OH⁻) ions, which can neutralize acids. However, if CO3²⁻ and HCO3⁻ are present simultaneously without the corresponding acid or base to balance them, they would neutralize each other, leading to a stable pH and effectively reducing the overall alkalinity. In essence, for alkalinity to be significant, these ions must exist in a way that allows them to contribute to acid neutralization rather than cancel each other out. Thus, the concurrent presence of all three ions would not result in high alkalinity.