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Questions and Answers
What is the purpose of alkalinity measurement in water chemistry?
What is the purpose of alkalinity measurement in water chemistry?
- To measure the buffering capacity of water (correct)
- To assess the turbidity of water
- To determine the concentration of calcium and magnesium
- To calculate the dissolved silica content
Which of the following is NOT a major inorganic constituent commonly found in terrestrial water?
Which of the following is NOT a major inorganic constituent commonly found in terrestrial water?
- Chloride
- Nitrate
- Silica
- Iron (correct)
How is alkalinity typically expressed in water analysis reports?
How is alkalinity typically expressed in water analysis reports?
- In moles per liter (mol/L)
- In equivalent per liter (eq/L) (correct)
- In parts per million (ppm)
- In grams per liter (g/L)
Which of the following is a key component contributing to the overall alkalinity in most water systems?
Which of the following is a key component contributing to the overall alkalinity in most water systems?
What does a decrease in pH from 8.5 to 4.5 indicate in terms of water chemistry?
What does a decrease in pH from 8.5 to 4.5 indicate in terms of water chemistry?
Which parameter is used to quantify the acid required to lower the pH of a water sample to 4.5?
Which parameter is used to quantify the acid required to lower the pH of a water sample to 4.5?
What is the main cause of water hardness?
What is the main cause of water hardness?
Which ions contribute to the total hardness in practice?
Which ions contribute to the total hardness in practice?
What is the most common unit used to express water hardness in terms of equivalent CaCO3 mass?
What is the most common unit used to express water hardness in terms of equivalent CaCO3 mass?
How is Equivalent Weight (EW) calculated?
How is Equivalent Weight (EW) calculated?
Which compound has an Equivalent Weight of 50 g/eq?
Which compound has an Equivalent Weight of 50 g/eq?
What ions are involved in the dissolution of CaCO3?
What ions are involved in the dissolution of CaCO3?
What is the size range of viruses?
What is the size range of viruses?
Which organism is a parasitic worm?
Which organism is a parasitic worm?
What is the infectious dose that N50 represents?
What is the infectious dose that N50 represents?
Which microorganism is particularly resistant to chemical disinfectants?
Which microorganism is particularly resistant to chemical disinfectants?
In a Plaque Assay, what does a plaque refer to?
In a Plaque Assay, what does a plaque refer to?
Where did the Milwaukee pathogen outbreak of 1993 occur?
Where did the Milwaukee pathogen outbreak of 1993 occur?
What is the purpose of recarbonation in the water softening process?
What is the purpose of recarbonation in the water softening process?
What does the parameter 𝐺𝑡𝑑 represent?
What does the parameter 𝐺𝑡𝑑 represent?
In the Lime-Soda process, what is added in order to remove magnesium non-carbonate hardness?
In the Lime-Soda process, what is added in order to remove magnesium non-carbonate hardness?
Why do bigger plants typically have lower energy consumption in coagulation-flocculation processes?
Why do bigger plants typically have lower energy consumption in coagulation-flocculation processes?
What is the outcome of the reaction between Ca(OH)2 and CO2 during recarbonation?
What is the outcome of the reaction between Ca(OH)2 and CO2 during recarbonation?
What is the primary cause of water hardness?
What is the primary cause of water hardness?
Excess water hardness can lead to poor lathering performance of soaps due to:
Excess water hardness can lead to poor lathering performance of soaps due to:
How does the Lime-Soda process contribute to water softening?
How does the Lime-Soda process contribute to water softening?
What is the primary function of the ion exchange process in water softening?
What is the primary function of the ion exchange process in water softening?
What is the formula to calculate Total Hardness (TH) in mg/L as CaCO3?
What is the formula to calculate Total Hardness (TH) in mg/L as CaCO3?
What are the most abundant dissolved inorganic constituents found in water that contribute to water hardness?
What are the most abundant dissolved inorganic constituents found in water that contribute to water hardness?
Why is soda ash (Na2CO3) added in the Lime-Soda process for water softening?
Why is soda ash (Na2CO3) added in the Lime-Soda process for water softening?
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