Cn⁻ cyanide - Study guides, Class notes & Summaries
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A Level Chemistry OCR A Questions & 100% correct Answers- Latest Test | Graded A+ | Passed
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Ammonium ion 
Ξ -:- NH₄⁺ 
Nitrate ion 
Ξ -:- NO₃⁻ 
Nitric Acid 
Ξ -:- HNO₃ 
Covalent bond 
Ξ -:- A covalent bond is the strong electrostatic attraction between a shared pair of 
electrons and the nuclei of the bonded atoms 
Dative covalent bond 
Ξ -:- A dative covalent bond is a shared pair of electrons where both electrons are 
from the same atom 
Cyanide ion 
Ξ -:- CN⁻ 
Shape of molecule with *2* bonded electron pairs 
Ξ -:- Linear, 180 ° 
Shape of molecule with *3* bonde...
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DAT Polyatomic Ions Final Study Questions Correctly Answered.
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DAT Polyatomic Ions Final Study Questions Correctly Answered. 
 
 
hydroxide - CORRECT ANSWER OH⁻¹ 
 
cyanide - CORRECT ANSWER CN⁻¹ 
 
acetate - CORRECT ANSWER C₂H₃O₂⁻¹ 
 
perbromate - CORRECT ANSWER BrO₄⁻¹ 
 
bromate - CORRECT ANSWER BrO₃⁻¹ 
 
bromite - CORRECT ANSWER BrO₂⁻¹ 
 
hypobromite - CORRECT ANSWER BrO⁻¹ 
 
perchlorate - CORRECT ANSWER ClO₄⁻¹ 
 
chlorate - CORRECT ANSWER ClO₃⁻¹ 
 
chlorite - CORRECT ANSWER ClO₂⁻¹ 
 
hypochlorite - CORRECT ...
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Polyatomic Anions || 100% correct solutions
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SO₄²⁻ correct answers Sulfate ion 
 
SO₃²⁻ correct answers Sulfite ion 
 
HSO₄⁻ correct answers Hydrogen sulfate ion 
 
S₂O₃²⁻ correct answers Thiosulfate ion 
 
NO₂⁻ correct answers Nitrite ion 
 
NO₃⁻ correct answers Nitrate ion 
 
ClO⁻ correct answers Hypochlorite ion 
 
ClO₂⁻ correct answers Chlorite ion 
 
ClO₃⁻ correct answers Chlorate ion 
 
ClO₄⁻ correct answers Perchlorate ion 
 
HPO₃²⁻ correct answers Hydrogen phosphite ion 
 
HPO₄²⁻...
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DAT - Common Ions 100% Correct
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DAT - Common Ions 100% Correct NH4+ Ammonium 
H3O+ Hydronium 
Hg2 2+ Mercury (I) 
H2PO 3- Dihydrogen Phosphite 
H2PO 4- Dihydrogen Phosphate 
HCO 3- Hydrogen Carbonate 
HSO 3- Hydrogen Sulfite 
HSO 4- Hydrogen Sulfate 
NO 2- Nitrite 
NO 3- Nitrate 
OH- Hydroxide 
CH3COO- Acetate 
CrO 2- Chromite 
CN- Cyanide 
CNO- Cyanate 
CNS- Thiocyanate 
MnO4- Permanganate 
ClO- Hypochlorite 
ClO 2- Chlorite 
ClO 3- Chlorate 
ClO 4- Perchlorate 
BrO- Hypobromite 
BrO 2- Bromite 
BrO 3- Bromate 
BrO 4- Perbrom...
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AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022
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AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022. Brown colour removed Goes colourless 
Allow (orange) brown to colourless 
Allow purple to colourless 
1 
(AO3) 
Question Answers Additional Comments/Guidelines Mark 
01.5 
As T increases rate (1/t ) increases OR time for completion decreases 
Exponentially 
OR 
By a greater/ increasing factor 
Many more particles have E ≥ Ea 
Or rate increases more and more as temp 
increases i.e. description of exponen...
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Polyatomic Ions Test Questions and Answers
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Polyatomic Ions Test Questions and Answers 
ammonium ion - Answer-NH₄⁺ 
 
hydronium ion - Answer-H₃O⁺ 
 
acetate ion - Answer-C₂H₃O₂⁻ (or CH₃COO⁻) 
 
azide ion - Answer-N₃⁻ 
 
hydroxide ion - Answer-OH⁻ 
 
peroxide ion - Answer-O₂²⁻ 
 
carbonate ion - Answer-CO₃²⁻ 
 
hydrogencarbonate ion - Answer-HCO₃⁻ 
 
bicarbonate ion - Answer-HCO₃⁻ 
 
chromate ion - Answer-CrO₄²⁻ 
 
dichromate ion - Answer-Cr₂O₇²⁻ 
 
cyanide ion - Answer-CN⁻ 
 
perbr...
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aqa_a_level_chemistry_7405_1_paper_1and_2_inorganic_and_physical_chemistry_exam_and__mark_scheme
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A-level 
CHEMISTRY 
7405/1 
Paper 1 Inorganic and Physical Chemistry 
Mark scheme 
June 2023 
Version: 1.0 Final 
AQA A-level CHEMISTRY 7405-1 Paper 1 Inorganic and Physical Chemistry Mark scheme June 2023, 
Exams for Chemistry 
*206A74051/MS* 
 
AQA A-level CHEMISTRY 7405-1 Paper 1 Inorganic and Physical Chemistry Mark scheme June 
2022, Exams for Chemistry 
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant 
questions, by a panel of subject teach...
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Honors Chemistry - Polyatomic Ions
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Honors Chemistry - Polyatomic Ions 
C₂H₃O₂⁻ ️acetate 
NH₄⁺ ️ammonium 
CO₃²⁻ ️carbonate 
ClO₃⁻ ️chlorate 
ClO₂⁻ ️chlorite 
CrO₄²⁻ ️chromate 
CN⁻ ️cyanide 
Cr₂O₇²⁻ ️dichromate 
H₂PO₄⁻ ️dihydrogen phosphate 
HCO₃⁻ ️hydrogen carbonate (or bicarbonate) 
HPO₄²⁻ ️monohydrogen phosphate 
HSO₄⁻ ️hydrogen sulfate (or bisulfate) 
HSO₃⁻ ️hydrogen sulfite (or bisulfite) 
OH⁻ ️hydroxide 
ClO⁻ ️hypoch...
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A-level CHEMISTRY 7405/2
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A-level 
CHEMISTRY 
7405/2 
Paper 2 Organic and Physical Chemistry 
Mark scheme 
June 2024 
Version: 1.0 Final 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination....
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Chem AUI Certification Exam Questions And Correct Detailed Answers.
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Ammonium - correct answer NH₄⁺ 
 
Cyanide - correct answer CN -1 
 
Acetate - correct answer C₂H₃O₂⁻1 
 
Hydroxide - correct answer OH -1 
 
hydronium - correct answer H₃O⁺ 
 
Mono - correct answer 1 
 
Di - ...
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