Search & Filtering
50 mL of a water sample consumed 28.2 mL of EDTA upon titration. The water was treated with zeolite method and 50 mL of the treated water consumed 2.3 mL of EDTA solution. 50 mL of SHW required 21 mL of EDTA. Calculate how much of hardness is removed by the zeolite process? (SHW = 2.5g/L)
Calculate the temporary hardness and total hardness of a sample of water containing magnesium bicarbonate, 73 mg/L; Calcium bicarbonate, 162 mg/L, magnesium chloride, 95 mg/L, Calcium sulphate, 136 mg/L
Calculate the amount of lime and soda (assuming that they are 100% pure) for the treatment of 1,00,000 L of water, whose analysis report is as follows: Ca(HCO3)2 = 15.3 ppm, Mg(HCO3)2 = 19 ppm, CaSO4 = 24.6 ppm, CaCl2 = 27.75 ppm, MgSO4 = 35 ppm, MgCl2 = 25 ppm, NaAlO2 = 16 ppm, Fe2O3 = 3.3 ppm, KNO3 = 3 ppm, NaCl = 10 ppm. Also, calculate the temporary and permanent hardness of the water sample in terms of CaCO3 equiv
Calculate the amount of lime (88.3% pure) and soda (99.2% pure) required to soften 24,000L of water per day in a year containing the following: CaCO3 = 1.85 ppm, MgCO3 = 0.42 ppm, MgSO4 = 0,9 ppm, CaSO4 = 0.34 ppm, MgCl2 = 0.76 ppm, NaCl = 2.36 ppm and SiO2 = 2.34 ppm.
Calculate the amount of lime (74% pure) and soda (95% pure) for the treatment of 70,000 L of water, whose analysis report is as follows: Ca(HCO3)2 = 40.5 ppm, Mg(HCO3)2 = 39 ppm, MgSO4 = 30 ppm, CaSO4 = 34 ppm, CaCl2 = 27.75ppm, KNO3 = 3 ppm, NaCl = 10 ppm. Also, calculate the temporary and permanent hardness of the water sample in terms of CaCO3 equiv.
20 mL of the standard hard water (containing 15g of CaCO3 per litre) required 10 mL of EDTA solution for endpoint. 100 mL of the water sample required 18 mL of EDTA solution. While the same volume of water after boiling consumed 12 mL of the EDTA solution. Calculate the carbonate and non-carbonate hardness present in water. Which buffer is used for the titration and at what pH?
0.28 g of CaCO3 was dissolved in dil. HCl and the solution was made up to 1000 mL with distilled water. 100 mL of the above solution required 28 mL of EDTA solution on titration. 100 mL of the hard water sample required 33 mL of the same EDTA solution on titration. After boiling, 100 mL the sample required 10 mL of EDTA solution. Solve each type of hardness in ppm
Calculate the carbonate and non-carbonate hardness of a water effluent in a textile industry. The analysis revealed that 50 mL of water sample required 12.5 mL of 0.01M EDTA solution and the titration after boiling the same volume of water sample consumed only 7 mL of EDTA. However, 20 mL of standard hard water (containing 1 g of CaCO3 per litre) consumed 20 mL of EDTA solution
Substances that change their state but do not change their composition
state two features of a reaction mixture that is in dynamic equilibrium
