Question

13. Hydrogen Fluoride (HF) is a covalentens It is: ANonpolar B. Polar 14. Would you expect water to dissolve Hydrogen Fluoride? A. Yes B. No 15. What is the best equation for the dissociation (ionization) using HF instead of HCl, understanding that HF is a WEAK electrolyte (and acid). A. HF(g) + H2O(l) HF (aq) B. HF(g) + H2O(1) - H +F C. HF(g) + H2O(l) HUF 16. You dissolve 1 mole of HF(g) in water and bring the volume to 1 L per the reaction and information in 015 above. What is the concentration of hydrogen ion in the resulting solution A. essentially 1 molar B. molar C. much less than 1 molar D. cannot tell 17. Calcium Chloride CaCl2 is an ionic solid and a strong electrolyte. I weigh out 0.10 moles of Calcium Chloride and dissolve it in water to make one liter of solution. What is the concentration of Calcium Chloride in the resulting solution: (Molecular mass is 110.98.) (There are more than one answer! give both)? A. 1.0M B. 0.10 M C. 10 M D. 10 mM E. 100 mM 18. In the resulting solution in question 17 - what is the concentration of Calcium ion? A. 1.0M B. 0.150 M C. 10 M D. 100 mm E. 0.111 mM 19. And now the concentration of Chloride in the resulting solution in question 142 A. 2 mM B. 0.1 mM c. 10 m M D. 200 mM E. 0.222 mm 20. How many grams of Calcium Chloride should I weigh out for question 14.2 A. 0.1 grams B. 111 grams B. 1 grams C. 0.111 grams 21. You receive a blood chemistry report from Japan, Brittan or Canada which gives a Glucose (Blood Sugar) result of 8.9 mmol/L. You are on Guam and understand that here we express blood sugar as mg/dL so you convert the received value to the unit we use here: A. 8.9 mg/L B. 16 mg/dL C.160 mg/dL D. 0.89 mg/dL 22-24. Match regarding the movement of ions or molecules: 22. dialysis A. movement of solvent (water) across a membrane by hydrostatic pressure 23. osmosis B. movement of solute across a membrane by concentration gradient 24. reverse osmosis C. movement of solvent across membrane by concentration gradient 25. You have a 3 M solution of Sodium Chloride in water. You take 100 mL of this solution and add water to until you have 250 mL of total new solution. What is its concentration: A. IM B. 1.5 M C. 1.2 mM D. 3 M E. 1.2 M

Answer 1

Solution 13.

ALL Solution 13. Hydrogen Fluoride us ia Covalent gas... 1. Hf us in Polar: molecule. because of the very high clotterence in electronegativite un Hydrogen and Fluorine. The bond will be polase