Choose the best answer for each of the following. What color are aqueous Na^+ so
ID: 504070 • Letter: C
Question
Choose the best answer for each of the following. What color are aqueous Na^+ solution? a) green b) violet c) yellow d) red-brown e) none of the above An aqueous solution of CuSO_4 if treated with aqueous ammonia. Upon initial addition a blue precipitate forms. Upon continued addition of the ammonia the precipitate dissolves and a deep blue solution is formed. What is the precipitate, and what is the product when the precipitate dissolves? a) Cu(NH_3)_4^2+, Cu(OH)_2 b) Cu(OH)_2, Cu(NH_3)_4^2+ c) Cu(OH)_4^2-, Cu(OH)_2 d) Cu(OH)_2, Cu(OH)_4^2- e) none of the above 25.00 mL of HF is titrated to the endpoint with 35.1 mL of a 0.100 MKOH solution. what is the molarity of the HF solution The K_a of HF is 7.2 times 10^-4. a) 0.140 b) 0.584 c) 0.100 d) 0.00849 e) none of the above For the coordination compound, [M(NH_3)_2Cl]Cl_3: What is the state of M?, If the atomic number of M is 28, how many d electrons does it have? a) +3,3 b) +2,8 c) +4,8 d) +1,9 e) none of the above Which reagent would dissolve solid silver chloride? a) 6M NaOH to excess b) 6M NH_3 to excess d) 6M HNO_3 to acidic e) none of the above The compound, [Fe(H_2O)_6]^+2 is the para-magnetic. Is the H_2O ligand inducing a strong or weak field? a) strong b) weak c) not enough information d) none of the above Why don't sharks cat clowns? a) because they taste funny b) Zn c) because they taste funny d) NaOH e) none of the above What color are Ag^+ solutions? a) green b) colorless c) light yellow d) dark red none of the above What color is PbCrO4? a) white b) yellow-orange c) green d) bright red e) none of the above How many d electrons does Cr^3+ have? a) 3 v) 2 c) 1 d) 0 e) none of the above A 10.0 mL saturated solution of Ca(IO_3)_2 is titrated to the endpoint with 7.02 mL of a 0.050 M Na_2S_2O_ 3. Prior to titration the Ca(IO_3)_20 solution was reacted with KI and a HCL solution, IO_3^- + 5I^- + 6H^+ rightarrow 3I_2 + 3H_2 O a) 1.0 times 10^-7 b) 5.9 times 10^-3 c) 2.0 times 10^-7 d) 6.8 times 10^-5 e) none of the aboveExplanation / Answer
1. Color of aqueous Na+ ions would be,
c) Yellow
2) Deept blue complex formed would be,
b) Cu(OH)2, [Cu(NH3)4]2+
3. molarity of HF = 0.1 M x 35.1 ml/25 ml
a) 0.14 M
4. Oxidation state of M in the compound,
c) +4, 8
5. Solid silver chloride dissolved in NH3 by forming a soluble complex,
b) 6 M NH3 to basic
6. H2O is a,
b) weak field ligand
7. Sharks don't eat clows,
a) because they taste funny
8. Color of Ag+ solutions
b) colorless
9. PbCrO4 color is,
b) yellow-orange
10. Cr3+ has d electrons,
a) 3
11.
6. Ksp of Calcium iodate would be,
e) none of the above