Could you explain why some labs would use Methyl Purple Indicator Solution for Total Alkalinity Testing vs. using Methyl Orange, or Bromocresol Green-Methyl Red Indicator?
Hi John. For this test it was Sulfuric Acid 0.02N (N/5O). You can see the complete reagent set online here: catalog.aquaphoenixsci.com/product/alkalinity-pt-reagent-set
You multiply the number of milliliters by 20 because that is the equivalency for this titration. When you titrate a 50mL sample with Sulfuric Acid 0.02N (N/50), each milliliter of titrant used will be equivalent to 20ppm of alkalinity expressed as Calcium Carbonate in your sample.
What if I titrate 100 mL sample with 0.02 N H2SO4 or 0.02 N HCl. What is the conversion factor? Then how to calculate the conversion factor from the given information such as, Concentration of titrant and volume of the sample.
Could you explain why some labs would use Methyl Purple Indicator Solution for Total Alkalinity Testing vs. using Methyl Orange, or Bromocresol Green-Methyl Red Indicator?
@aquaphoenixsci this is a good one
What was the sulfuric acid concentration used for the titrant?
Hi John. For this test it was Sulfuric Acid 0.02N (N/5O). You can see the complete reagent set online here: catalog.aquaphoenixsci.com/product/alkalinity-pt-reagent-set
Sir why we multiply by 20
You multiply the number of milliliters by 20 because that is the equivalency for this titration. When you titrate a 50mL sample with Sulfuric Acid 0.02N (N/50), each milliliter of titrant used will be equivalent to 20ppm of alkalinity expressed as Calcium Carbonate in your sample.
What if I titrate 100 mL sample with 0.02 N H2SO4 or 0.02 N HCl. What is the conversion factor?
Then how to calculate the conversion factor from the given information such as,
Concentration of titrant and volume of the sample.