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A standard hard water contains 15 gm of CaCO3 per lite. 20 ml of this required 25 ml of EDTA solution. 100ml of sample water required 18 ml EDTA solution. The same sample after boiling required 12 ml EDTA solution. Calculate the temporary hardness of the given sample of water, in terms of ppm
Are ketones part in the acyl group?
how would you solve “Suppose you have 150 mL of a 17.5% NH4OH solution (m/V). How many mL
of this solution would be needed to get 21.0g of NH4OH?”
At STP a certain mass of gas occupies a volume of 800cm3.find the temperature at which the gas occupies 940cm3 and has a pressure of 675mmHg
What is the mass of water in 0.01132 moles of MgSO4.7H2O ?
An office heater puts out 2090 Btu
(British thermal units) of energy in the form of heat per hour. Given that 1 Btu=1.055 kJ,
how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater, assuming continuous operation?
energy produced:
heir pressures are 911.7 kPa, 3800 mmHg, and 117.6 psi.
50 ml of water sample requires 18 ml of 0.05M EDTA, during titration whereas 50 ml of
boiled water sample requires 12.5 ml of same EDTA in the titration. Calculate total,
permanent and temporary hardness of water
How many grams of
KClO3 must be decomposed to produce 91.7 g O
2
91.7 g O2?
NaIO3 + 5NaI + 2H3C6H5O7 → 3I2 + 3H2O + 2Na3C6H5O7
=? g/ml
