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![K CroL oxidation no of Cr=a +1 + x + (-2) x2=0 1+x - 4=0 x=+3]](http://img.homeworklib.com/questions/e9184820-1ed8-11ea-8f6f-09bdd057cdf3.png?x-oss-process=image/resize,w_560)
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QUESTION 15 The oxidation number of chromium in sodium chromite, KCrO2, is O a.–2. ob.+1. Oc+3. Od. +2. e. 1. QUEST...
The oxidation of chromium in sodium chromite NaCrO2 is A. +2 B. +1 C. -1 D....
The oxidation of chromium in sodium chromite NaCrO2 is A. +2 B. +1 C. -1 D. +3 E. -2
QUESTION 16 Which of the following is a weak acid in aqueous solution? a. HBr b.HI...
QUESTION 16 Which of the following is a weak acid in aqueous solution? a. HBr b.HI c. HNO 2 d. HCIO 4 e. H2SO4 QUESTION 13 All of the following half-reactions are balanced except O a. H 3PO 3( aq) + H 20(1) - H3PO 4( aq) + 2H +(aq) + 2e -. O b. H 20 2(aq) → 20H "(aq) + 2e . OC 2H 20( ) + 2e - → H2(g) + 20H (aq). d. 27a( S) +...
Question 14 4 pts In which substance does bromine have an oxidation number of +1? A)...
Question 14 4 pts In which substance does bromine have an oxidation number of +1? A) Br2 B) HBrO C) HBrO2 D) HBr OB OC OD ОА 4 pts Question 15 Identify the place which has the highest boiling point of water.
Question 1 (10 points) Which molecules at least one polar bond? OA (CF) OB(CH,O) Oc(N,0) OD...
Question 1 (10 points) Which molecules at least one polar bond? OA (CF) OB(CH,O) Oc(N,0) OD (NH3) DE(CHCI3) OF(NO2) Question 2 (10 points) Which molecules have a partial negative charge on a nitrogen atom? OA (CF) DB (CHO) Oc(N2O) OD (NH3) OE (CHC13) OF(NO2) Question 3 (10 points) . I 1 1 lo . o Which molecules shown are polar? OA (CF) CB (CHO) Oc(N₂O) Do(NH3) JE (CHC13) OF (NO₂)
1. Which of the following compounds in an aqueous solution is a weak acid? A) H2S...
1. Which of the following compounds in an aqueous solution is a weak acid? A) H2S B) HI C) HBr D) H2SO4 E) HCIO 2. Identify the major ionic species present in an aqueous solution of H2SO4. A) S6, 036-(plus H2O as a neutral species) B) H', OH, 56,302- C) 2H, 56, 402- D) H', HS04 E) 24*, SO42- 3. Which of the following represents an acid-base neutralization reaction? A) 2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g) B) SO2(g) +...
The oxidation states of potassium and each iodine in potassium tri-iodide are OA. 1, 1/3 OB....
The oxidation states of potassium and each iodine in potassium tri-iodide are OA. 1, 1/3 OB. -1, 2/3 OC. 1, -1/3 OD. 1/3, -1 O E. 1, -3 OF. 1,-2/3 Reset Selection
QUESTION 18 Refer to equation number 9. What is the value of A? A.2 OB.+1 OC.-1...
QUESTION 18 Refer to equation number 9. What is the value of A? A.2 OB.+1 OC.-1 OD. QUESTION 19 Refer to equation number 10. What is the value of Z? A.1 B.2 0.4 D.O QUESTION 20 1 pc Refer to equation number 10. What is the value of A? A.1 B.4 C.D.2 E 4 MC Questions 1 - 10 1. 18Ne → 1%F + 2x + v 2. Ca -- Sc + 4x +v 3. Cu - Cu + 2x...
(time=2 +5+4+1+3 = 15 minutes] Suppose a solution of chromium in 1 Macid is knocked over and its contents are spilt. Us...
(time=2 +5+4+1+3 = 15 minutes] Suppose a solution of chromium in 1 Macid is knocked over and its contents are spilt. Use the Question 6 Pourbaix diagram below to answer the following questions Cr O, Cro 10 0.5 Cr 00 Cr(OH) 05 -10 Cr -1.5 2 10 12 14 pH What is the predominant form of chromium in 1 M acid in contact with the air? (a) (b) Write a balanced redox equation between the two highest oxidation states of...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
Question 1 What is the coordination number of chromium in the following coordination compound (Cr(C204)2(H20)2]C12? (C2042-oxalate...
Question 1 What is the coordination number of chromium in the following coordination compound (Cr(C204)2(H20)2]C12? (C2042-oxalate ion, ox) O a. 4 b.6 OC. 8 O d. 2 e. 5 Question 2 Calculate the pH of 100.0 mL of a 0.100 M solution of Ca(OH)2 (molar mass = 74.1g/mol) O a. 12.0 O b. 13.3 OC. 0.100 O d. 0.200 e. 13.0
QUESTION 16 Which of the following is a weak acid in aqueous solution? a. HBr b.HI c. HNO 2 d. HCIO 4 e. H2SO4 QUESTION 13 All of the following half-reactions are balanced except O a. H 3PO 3( aq) + H 20(1) - H3PO 4( aq) + 2H +(aq) + 2e -. O b. H 20 2(aq) → 20H "(aq) + 2e . OC 2H 20( ) + 2e - → H2(g) + 20H (aq). d. 27a( S) +...
Question 14 4 pts In which substance does bromine have an oxidation number of +1? A) Br2 B) HBrO C) HBrO2 D) HBr OB OC OD ОА 4 pts Question 15 Identify the place which has the highest boiling point of water.
Question 1 (10 points) Which molecules at least one polar bond? OA (CF) OB(CH,O) Oc(N,0) OD (NH3) DE(CHCI3) OF(NO2) Question 2 (10 points) Which molecules have a partial negative charge on a nitrogen atom? OA (CF) DB (CHO) Oc(N2O) OD (NH3) OE (CHC13) OF(NO2) Question 3 (10 points) . I 1 1 lo . o Which molecules shown are polar? OA (CF) CB (CHO) Oc(N₂O) Do(NH3) JE (CHC13) OF (NO₂)
1. Which of the following compounds in an aqueous solution is a weak acid? A) H2S B) HI C) HBr D) H2SO4 E) HCIO 2. Identify the major ionic species present in an aqueous solution of H2SO4. A) S6, 036-(plus H2O as a neutral species) B) H', OH, 56,302- C) 2H, 56, 402- D) H', HS04 E) 24*, SO42- 3. Which of the following represents an acid-base neutralization reaction? A) 2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g) B) SO2(g) +...
The oxidation states of potassium and each iodine in potassium tri-iodide are OA. 1, 1/3 OB. -1, 2/3 OC. 1, -1/3 OD. 1/3, -1 O E. 1, -3 OF. 1,-2/3 Reset Selection
QUESTION 18 Refer to equation number 9. What is the value of A? A.2 OB.+1 OC.-1 OD. QUESTION 19 Refer to equation number 10. What is the value of Z? A.1 B.2 0.4 D.O QUESTION 20 1 pc Refer to equation number 10. What is the value of A? A.1 B.4 C.D.2 E 4 MC Questions 1 - 10 1. 18Ne → 1%F + 2x + v 2. Ca -- Sc + 4x +v 3. Cu - Cu + 2x...
(time=2 +5+4+1+3 = 15 minutes] Suppose a solution of chromium in 1 Macid is knocked over and its contents are spilt. Use the Question 6 Pourbaix diagram below to answer the following questions Cr O, Cro 10 0.5 Cr 00 Cr(OH) 05 -10 Cr -1.5 2 10 12 14 pH What is the predominant form of chromium in 1 M acid in contact with the air? (a) (b) Write a balanced redox equation between the two highest oxidation states of...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
Question 1 What is the coordination number of chromium in the following coordination compound (Cr(C204)2(H20)2]C12? (C2042-oxalate ion, ox) O a. 4 b.6 OC. 8 O d. 2 e. 5 Question 2 Calculate the pH of 100.0 mL of a 0.100 M solution of Ca(OH)2 (molar mass = 74.1g/mol) O a. 12.0 O b. 13.3 OC. 0.100 O d. 0.200 e. 13.0
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