Homework Answers
5.
Deionized water : In deionized water no ions are present , which means no dissolved mineral salts are present . Deionized water is produced by ion exchanged resins. Ion exchange resins remove non desirable cations and anons from water.
Impurities like salts of Calcium , Magnesium , Iron, Sodium , Chloride, Sulphate , Nitrate , Bicarbonate and toxic heavy metals are removed by deionization of water.
Neutral organic pollutants and microbes are not removed by deionization of water.
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5. What is deionized water? What kind of impurities can be removed by deionization? What kind...
Question 10 1 pts How can coloured impurities be removed from a solid compound by the...
Question 10 1 pts How can coloured impurities be removed from a solid compound by the recrystallisation process? removed by hot filtration (remain in filter paper) removed by boiling off from solution 0 remain in solution-not present in sufficient quantity to crystallise out 0 heat solution with decolourising charcoal followed by hot filtration Question 4 1 pts Before heating acetanilide and water to boiling point a third ingredient" must be added. What is this "ingredient? Othermometer antibumping granules O glass...
What is the volume of 50.0652 g of pure deionized water at 23.5 degrees ?
What is the volume of 50.0652 g of pure deionized water at 23.5 degrees ?
What is the volume of 50.0652 g of pure deionized water at 23.5 degrees ?
What is the volume of 50.0652 g of pure deionized water at 23.5 degrees ?
5) Phosphoric acid (H3PO4) is added to deionized water at a total concentration of 0.01 M...
5) Phosphoric acid (H3PO4) is added to deionized water at a total concentration of 0.01 M and then sodium hydroxide is added until the pH is increased to 5.0. a) What is the value of the first ionization fraction (a for H2PO4)? b) What molar concentration of H2PO4' would you expect at this pH?
What mass of NaClO must be dissolved in 450 g of deionized water to make a...
What mass of NaClO must be dissolved in 450 g of deionized water to make a 100 ppm solution? Assume the density of the resulting solution is 1.00 g·mL-1.
0.5 mL of a 0.04 M CoCl2 solution is combined with 1.5 mL deionized water. What...
0.5 mL of a 0.04 M CoCl2 solution is combined with 1.5 mL deionized water. What is the molarity of the solution?
6.52 grams of sodium hydrogen carbonate is weighed into a 150 ml beaker and dissolved in 100 ml of deionized water. The...
6.52 grams of sodium hydrogen carbonate is weighed into a 150 ml beaker and dissolved in 100 ml of deionized water. The solution is then quantitatively transfer to a 250.0 mL volumetric flask and filled to the line with deionized water. What is the molarity of hydrogen carbonate in the volumetric flask?
24) If 10.00 mL of 12.1 M HCl was diluted with deionized water to a total...
24) If 10.00 mL of 12.1 M HCl was diluted with deionized water to a total volume of 0.950 L, what will be the concentration of the final solution? [2 points]
When your sample contain a large amount of water (cannot be removed) and you plan to...
When your sample contain a large amount of water (cannot be removed) and you plan to measure their vibration spectra, what will you do?
Treating Drinking Water Phosphate can be removed from drinking-water supplies by treating the water with Ca(OH)2....
Treating Drinking Water Phosphate can be removed from drinking-water supplies by treating the water with Ca(OH)2. How much Ca(OH), is required to remove 90% of the PO43-from 4.5 × 106 L of drinking water containing 25 mg/L of PO
Question 10 1 pts How can coloured impurities be removed from a solid compound by the recrystallisation process? removed by hot filtration (remain in filter paper) removed by boiling off from solution 0 remain in solution-not present in sufficient quantity to crystallise out 0 heat solution with decolourising charcoal followed by hot filtration Question 4 1 pts Before heating acetanilide and water to boiling point a third ingredient" must be added. What is this "ingredient? Othermometer antibumping granules O glass...
5) Phosphoric acid (H3PO4) is added to deionized water at a total concentration of 0.01 M and then sodium hydroxide is added until the pH is increased to 5.0. a) What is the value of the first ionization fraction (a for H2PO4)? b) What molar concentration of H2PO4' would you expect at this pH?
Treating Drinking Water Phosphate can be removed from drinking-water supplies by treating the water with Ca(OH)2. How much Ca(OH), is required to remove 90% of the PO43-from 4.5 × 106 L of drinking water containing 25 mg/L of PO
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