A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL of water. Assume the solution has a density of 1.00 g/mL What is the concentration of Na* (MW = 22.9898 g/mol) in the solution in units of molarity (M)? concentration: М What is the concentration of Na+ in the solution in units of parts per thousand (ppt)? concentration: ppt A 50.0 mL aliquot of the solution is then diluted to a final volume of...
If you have 275 mg of sodium thiosulfate in 20 mL of water, and 14.8 mL of this solution was required to titrate 104 mg of iodine in 20 mL of solution, what is the amount in mg of Na2S2O3 that is required to completely reduce the 104 mg of I2?
What is the molarity of Na when 100.0 mol of Na2SO4 is dissolved in 20.00 L of water. (Assume the volume of solution equals the volume of water.) What is the molarity of SO42- when 100.0 mol of Na2SO4 is dissolved in 20.00L of water. (Assume the volume of solution equals the volume of water.) How many moles of sulfuric acid are in 300.0 mL of 2.00 M H2SO4(aq) What volume (in mL) of 5.00 M HCl(aq) contains 10.0 mol...
you need to make 250 mL of a 0.75 N sodium Goopate solution. you have Na Gloopate.10H2O with f.w. of 180.000, and has an assay value of 88%. anhydrous Na Gloopate has a f.w. of 100.000. how many grams of Na Gloopate.10H2O must you weigh out?
6+ (20 pts.) You prepare a buffer by ading 0.I mol of Na,PO, and 0.15 mol of NaJHPO, to 1.0 L of water. (pKal-2.148, pk, 7.198, and pKas 12.375) a. What do you expect the pH to be? b. If instead you begin with 1.0 L of a 0.1 M solution of NaH2POs, how many ml of a 0.5 M KOH solution do you need to add in order to reach a pH of 9.5?
5.3307 g of Na2CrO4 (MW 161.97 g/mol) is dissolved in 1000.0 mL of water. Assuming the solution has a density of 1.00 g/mL, what is the concentration of Na (MW 22.9898 g/mol) in the solution in units of a) molarity (M)? Number b) parts per thousand (ppt)? Number ppt c) 25.0 mL of the solution is then diluted to a final volume of 500.0 mL. What is the concentration of Na* in the diluted solution in units of parts per...
A solution is prepared by dissolving 25.0g of CaCl2 in 275 mL of water. Water has a density of 1.0g/mL.The solution has a final volume of 279 mL. (A) What is the total solute molality? (B) What is the freezing point of the solution? Assume ideal behavior. (C) What is the osmotic pressure of the solution at 25 C?
In an experiment, you need to create 275 mL of a 1M solution. You have 2L of a 5M stock solution. Calculate how much stock solution you would need to mix with water to make a 1M solution.You would take mL of the 5M stock solution in a flask and add mL of distilled water.Answers should be numerical (eg, 1, not one)
4. To prepare an anti-freezing agent, you need to dissolve ethylene glycol (0.75 mol) into water. (35.25 mol) Calculate the vapor pressure and vapor pressure lowering of this solution (P° = 92.5 Torr). 5. What are the boiling and freezing points of the aqueous solution when ethylene glycol (16.1 mol) dissolved into water (4.5 kg), respectively? Assume the pressure is I atm.
Pure water has a density of 1.000 g/mL. Assume that water determines the volume of the solution. Find the molarity of a solution if you have 0.1256 g NaCl dissolved in 1.250×103 g water.