Podcast
Questions and Answers
Define pH and how is it calculated?
Define pH and how is it calculated?
pH is a measure of the acidic or alkaline condition of water and is calculated as pH = -log {H+}.
What is the equilibrium constant for water at 25°C?
What is the equilibrium constant for water at 25°C?
The equilibrium constant for water at 25°C is Kw = 10^-14.
Explain why the pH of deionized water at 25°C is 7.0.
Explain why the pH of deionized water at 25°C is 7.0.
The pH of deionized water is 7.0 at 25°C because the concentration of hydrogen ion and hydroxyl ion is both 10^-7 M.
What does a pH value of less than 7 indicate?
What does a pH value of less than 7 indicate?
Explain why groundwater is often slightly acidic.
Explain why groundwater is often slightly acidic.
How is the activity of water treated in the equation Kw = {H+}{OH-}?
How is the activity of water treated in the equation Kw = {H+}{OH-}?
What materials are required for measuring the pH of a sample?
What materials are required for measuring the pH of a sample?
Why is it important to keep samples at 4°C before analyzing pH?
Why is it important to keep samples at 4°C before analyzing pH?
How does temperature affect the measurement of pH?
How does temperature affect the measurement of pH?
Why is preservation of the sample not practical?
Why is preservation of the sample not practical?
What precautions should be taken while performing the pH experiment?
What precautions should be taken while performing the pH experiment?
What role do buffer solutions play in the pH determination process?
What role do buffer solutions play in the pH determination process?
What can cause the measured turbidity values to be low?
What can cause the measured turbidity values to be low?
What can cause the measured turbidity values to be high?
What can cause the measured turbidity values to be high?
How can light absorbing materials affect turbidity readings?
How can light absorbing materials affect turbidity readings?
What can give low readings in turbidity measurement if present in the water?
What can give low readings in turbidity measurement if present in the water?
What can cause high readings in turbidity measurement?
What can cause high readings in turbidity measurement?
What should be done if turbidities exceed 40 units?
What should be done if turbidities exceed 40 units?
Why is it advised to record pH along with color when testing water?
Why is it advised to record pH along with color when testing water?
What is the environmental significance of color in water?
What is the environmental significance of color in water?
Why is it important to limit the color of water for domestic supplies?
Why is it important to limit the color of water for domestic supplies?
What is the drinking water guideline value for color according to Bangladesh Environment Conservation Rules (1997)?
What is the drinking water guideline value for color according to Bangladesh Environment Conservation Rules (1997)?
How is the standard color solution method used to determine the color of water?
How is the standard color solution method used to determine the color of water?
What type of appearance do waters containing natural color typically have?
What type of appearance do waters containing natural color typically have?
Explain how the turbidity of the original sample is calculated if 5 volumes of turbidity-free water were added to 1 volume of sample, and the diluted sample showed a turbidity of 30 units.
Explain how the turbidity of the original sample is calculated if 5 volumes of turbidity-free water were added to 1 volume of sample, and the diluted sample showed a turbidity of 30 units.
Why is turbidity important in filtration processes?
Why is turbidity important in filtration processes?
Why is turbidity important in disinfection processes?
Why is turbidity important in disinfection processes?
What are some commonly used methods for removing turbidity from water?
What are some commonly used methods for removing turbidity from water?
Discuss the nature of materials that cause turbidity in polluted river water.
Discuss the nature of materials that cause turbidity in polluted river water.
What limit is typically placed on turbidity in water supplies by current standards and why is such a limit set?
What limit is typically placed on turbidity in water supplies by current standards and why is such a limit set?
