0400 oSol/ 011 24) Which of the following is not a common strong base? a) NaOH d

Question

0400 oSol/ 011 24) Which of the following is not a common strong base? a) NaOH d) ca (O2 e) LiOR c) Be (OH)2 25) Consider a solution, which is 2.50·CaCl2·Cachis a strong (Formula weight of Caci2 is 110.98 u.) :What is the miliosmolarity sm17L) of the solution? a) 22.5 mOsmol/L b) 676 mosmol/L c) 225 mOsmo1/L d) 67.5 Osmo1/L e) 0.676 mOsmo1/L 26) Consider a solution which is 5.00 dextrose (hydrous) and 0.900Naci. What is the miliosmolarity (mosmol/L) of this solution? (The fomula weight of hydrous dextrose is 198.20 u formala weight of Naci is 58.4u.) a) 252 mOsmol/L a) 308 OsmoL/L d) 406 1/L e) 601 Osmol/ 27) The major blood buffer system is a) Hc2H392/c28302 2- d) H2so4RsO ) RSO4/304 Page 76

Explanation / Answer

25) 2.5% = 250 gms / 100mL = 250g/0.1L = 2500 g/L
molarity of 2.5% CaCl2 solution = 2500 g/mL / (110.98 gm /mol) = 22.5265 M
There are 3 miliosmoles per mole of CaCl2 (1 Ca2+ & 2Cl-) , so
MiliOsmolarity of 2.5% CaCl2 solution would be = 22.5265 * 3 = 67.5795 mosmol/L
Option d) is the answer.







  

Related Questions

Navigate

• Browse (All)
• Browse
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.