Question

Scotre e1047 ENis oxidized and O is reduced 6. jdentify the reducing agent in the following chemical reaction. Cd + Nio, 2H,ocd(OH ), + Ni(OH) OIN C HO D. Cajон): ЧноN 3 7. What element is reduced in the following chemical reaction? ed O'HZ+OS +'OSn 0s'HZ+ no на O'H 8. What mass of CaHOs (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in water? A. 0.293 g B. 293 g C. 0.692 g D. 52.7g E. 125 g 9. A 50.0 mL sample of 0.436 M NHaNO, is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution? A. 21.8 M B. 0.459 M c. 2.18 x 10 M ww D. 8.72 x 10 M E. 0.109 M 10. 17.5 mL of a 0.1050 M Na CO, solution is added to 46.0 mL of 0.1250 M NaCl. What is the concentration of sodium ion in the final solution?

Answer 1

Ed + Nio, 4210 - Cdlou), + Nilou), 1. Reducing agent reduces other but itself gets oxidised cd is Meducing agent. +) Cu + 2 H2,504 → C4.04 +502 + 2H,0 J (0) 277)+'*-8=0 (? x-4=0 26=74 X:+6 reduced. ó. Element reduced is is 8) Molarity - ginen mass x1 - Molar mass Molav mass volume in D 0.650 = x x 1000 180.15 450 X = 0.650 x 180.15X450 1000 X = 52.699 ~ 52.79 MIVI = M2 V2 where Mz Molarity , Va Volume 0.436 x 50.0 = M2x250 0.436 x 50 = M2 250 + M2 = 0.0872M or M2 = 8.72x10-2011 yek.