answers for all qestions

3:48 PM Mail. @ 63% 1. How many grams of water are needed for preparing 100 g of a normal saline solution (0.9% NaCl solution)? Answer: 2. How many grams of Ca(OH)2 will be required to prepare 150 g of a solution with a molar concentration of 2.14 M (solution density 1.0895 g/ml)? What is the molality of this solution? Answer: 3. What is a mass concentration (a titer) of a centinormal HCl solution? Give your answer in units of mg/ml. Answer: 4. Calculate how many grams of 40% and 1% glucose solutions will be required to prepare a 200 g of 5% solution? Answer: 5. Name the substances. Write and balance the reaction of their dissociation: a) NaHCO3 b) Ca(OH)2 c) (NH4)2SO4 d) H[AuCl.] 6. Which of these acids is the strongest one: H2SO3 (K=2.0.102), H3PO4 (K=7.52.10-), HF (K=5.62.104) or HCOOH (K=1.77-10-)? Answer: 7. After dilution of 10 ml of an aqueous NaOH solution up to 500 ml in a volumetric flask, the resulting solution has a concentration equal to 0.025 N. What is the concentration of the initial solution? Answer: 8. 2.9 mL of 0.1N HCl solution was used for titration of 5 mL of NaOH solution of unknown concentration. What is the normality and molarity of NaOH solution? Answer: 9. What is the molar concentration of the H2SO4 solution with pH 2? Answer: 10. Calculate the pH of 0.1 mol/L NH,OH solution. K (NH,OH) = 1.85-10%