Chemistry Total Hardness
Hey Basil,
Does anyone know how I can calculate the total hardness in this question:
The total hardness of any natural water sample is reported in terms of the mg of CaCO3 that would have to dissolve in one liter of water to give that same result. Consider the following data: "30.0 mL of water from river YY required 12.35 mL of 0.0114M EDTA to titrate it to the end-point using the procedure in section 2 (basically adding EBT drops to determine reactions between the cations and EDTA, etc.).
Calculate the total hardness of river YY in units of mg/L of CaCO3. Show you calculation and list any assumptions you had to make.
Thanks
April 11, 2013
4 Comments • Newest first
I need help balancing equations (sorry for stealing thread)
I think you have to like multiply by the molar mass of EDTA to convert to mg, but idk what to do after sorry.
You lost me at EDTA.
Sorry, I would love to help, but I didn't learn this yet.
I haven't done chemistry in years but here's my guess.
Assuming EDTA can be substituted with CaCO3 directly (lolol)
30.0 mL of water from river YY required 12.35 mL of 0.0114M EDTA
Find milligrams of EDTA
Put it over the mL of water
Convert mL to litres