X012/13/02
... (i) When the reactants have been heated gently for about 15 to 20 minutes, the mixture is allowed to cool. Separation of the product is carried out by adding saturated sodium chloride solution to the reaction mixture and vigorously shaking them together for about a minute and allowing them to settl ...
... (i) When the reactants have been heated gently for about 15 to 20 minutes, the mixture is allowed to cool. Separation of the product is carried out by adding saturated sodium chloride solution to the reaction mixture and vigorously shaking them together for about a minute and allowing them to settl ...
Metals
... Group 2B – 8B elements are also know as the ““Transition Metals” Transition Metals”. They may be found in the earth as pure metals or as ores (salts). ...
... Group 2B – 8B elements are also know as the ““Transition Metals” Transition Metals”. They may be found in the earth as pure metals or as ores (salts). ...
ic199p5a
... were given the neccessary enthalpy terms. Make a list of all of these enthalpy terms that would be needed for the calculation of HEA [O2] and for each term write a balanced equation for the chemical reaction involved and indicate whether that enthalpy value is likely to be positive, negative or app ...
... were given the neccessary enthalpy terms. Make a list of all of these enthalpy terms that would be needed for the calculation of HEA [O2] and for each term write a balanced equation for the chemical reaction involved and indicate whether that enthalpy value is likely to be positive, negative or app ...
Dr David`s Chemistry Revision Themes
... State the type of bonding shown in these compounds. ionic 2. The table below is an outline of the periodic table. It contains unknown elements denoted with arbitrary letters A to I (ie, not their official symbols). Identify and name these unknown elements. A = sodium B = tin C = bromine D = tungsten ...
... State the type of bonding shown in these compounds. ionic 2. The table below is an outline of the periodic table. It contains unknown elements denoted with arbitrary letters A to I (ie, not their official symbols). Identify and name these unknown elements. A = sodium B = tin C = bromine D = tungsten ...
AP Chemistry Summer Assignment
... (These products must be different elements and compounds than the element and compound as reactant to be a reaction. If they aren't different then NO reaction takes place and write NR.) M + QN > MN + Q or N + MR > MN + R ...
... (These products must be different elements and compounds than the element and compound as reactant to be a reaction. If they aren't different then NO reaction takes place and write NR.) M + QN > MN + Q or N + MR > MN + R ...
Reactions of common metals and properties of
... Atoms of the alkali metals are easily excited; even the flame of a Bunsen burner can excite their valence electrons. As the electrons jump back to lower energy levels, they give characteristic colours to the flame; lithium imparts a red colour, sodium a yellow colour, and potassium a lilac colour. T ...
... Atoms of the alkali metals are easily excited; even the flame of a Bunsen burner can excite their valence electrons. As the electrons jump back to lower energy levels, they give characteristic colours to the flame; lithium imparts a red colour, sodium a yellow colour, and potassium a lilac colour. T ...
Gen Chem Final--review problems Fall 2006
... For the acid/base reaction above in problem 1, identify the Bronsted acid/conjugate base pair and the Bronsted base/conjugate acid pair. Which main-group from the periodic table is described by each of the following: a.) ...
... For the acid/base reaction above in problem 1, identify the Bronsted acid/conjugate base pair and the Bronsted base/conjugate acid pair. Which main-group from the periodic table is described by each of the following: a.) ...
Unit C3 - Chemistry in Action
... Hardness can be measured by adding soap and seeing how much soap it takes to form a lather: No. of drops of soap needed to form a lather ...
... Hardness can be measured by adding soap and seeing how much soap it takes to form a lather: No. of drops of soap needed to form a lather ...
Unit C3 - Chemistry In Action
... Hardness can be measured by adding soap and seeing how much soap it takes to form a lather: No. of drops of soap needed to form a lather ...
... Hardness can be measured by adding soap and seeing how much soap it takes to form a lather: No. of drops of soap needed to form a lather ...
ch6 - ChemistryVCE
... In a metallic solid, there will be repulsion between the positive ions and between the delocalised electrons. The particles are arranged to minimise these repulsions. In an ionic lattice, the arrangement of alternating positive and negative ions also minimises repulsion between like charges. Agree. ...
... In a metallic solid, there will be repulsion between the positive ions and between the delocalised electrons. The particles are arranged to minimise these repulsions. In an ionic lattice, the arrangement of alternating positive and negative ions also minimises repulsion between like charges. Agree. ...
FORMULA WRITNG
... the products are elemental carbon and water vapor. (b) Potassium chloride is synthesized from its elements (c) Nitrogen monoxide plus oxygen gas gives nitrogen dioxide gas (d) Copper metal is placed in a solution of magnesium fluoride. (e) Ammonia gas burns in air to give nitrogen and water vapor (a ...
... the products are elemental carbon and water vapor. (b) Potassium chloride is synthesized from its elements (c) Nitrogen monoxide plus oxygen gas gives nitrogen dioxide gas (d) Copper metal is placed in a solution of magnesium fluoride. (e) Ammonia gas burns in air to give nitrogen and water vapor (a ...
CHAPTER 2
... bonding where an electron _____________________ reacts with another ________________. A COVALENT BOND is the result of the _____________________ of one or more electron _______________ between two ______________________ atoms. When molecular fluorine (F2) is formed, each atom _____________ an elec ...
... bonding where an electron _____________________ reacts with another ________________. A COVALENT BOND is the result of the _____________________ of one or more electron _______________ between two ______________________ atoms. When molecular fluorine (F2) is formed, each atom _____________ an elec ...
Document
... the anions and cations are separated from each other. This is called dissociation. – However, not all ionic compounds are soluble in water! • When compounds containing polyatomic ions dissociate, the polyatomic group stays together as one ion. • When molecular compounds dissolve in water, the only o ...
... the anions and cations are separated from each other. This is called dissociation. – However, not all ionic compounds are soluble in water! • When compounds containing polyatomic ions dissociate, the polyatomic group stays together as one ion. • When molecular compounds dissolve in water, the only o ...
+ H 2 O(g)
... First, the oxidation number of each atom have to be calculated and check if any of them changed. None of the oxidation numbers changes. CaO is a basic oxide as well as NH4+ is the protonated ammonia, then it can deliver H+ as an acid, then this reaction might be an acid base reaction. It occurs in h ...
... First, the oxidation number of each atom have to be calculated and check if any of them changed. None of the oxidation numbers changes. CaO is a basic oxide as well as NH4+ is the protonated ammonia, then it can deliver H+ as an acid, then this reaction might be an acid base reaction. It occurs in h ...
NC Exam Questions - Rosshall Academy
... (a) Draw a structural formula for the product formed when propanone is used instead of ethanal in this type of reaction. (1) (b) Name an aldehyde that would not take part in an aldol condensation. (1) (c) Apart from the structure of the reactants, suggest what is unusual about applying the term “con ...
... (a) Draw a structural formula for the product formed when propanone is used instead of ethanal in this type of reaction. (1) (b) Name an aldehyde that would not take part in an aldol condensation. (1) (c) Apart from the structure of the reactants, suggest what is unusual about applying the term “con ...
Problem Set 2
... Peroxyacylnitrate is one of the components of smog. It is a compound of C, H, N, and O. It has the following percent composition by mass: 19.8% C, 2.59% H, 11.6% N, and 66.0% O. a. Determine the simplest formula of the compound. b. What is the molecular formula of the compound if its molar mass is a ...
... Peroxyacylnitrate is one of the components of smog. It is a compound of C, H, N, and O. It has the following percent composition by mass: 19.8% C, 2.59% H, 11.6% N, and 66.0% O. a. Determine the simplest formula of the compound. b. What is the molecular formula of the compound if its molar mass is a ...
Question paper - Edexcel
... 10 When EDTA is added to [Cu(NH3)4]2+ in aqueous solution, the copper(II)-EDTA complex, [Cu(EDTA)]2–, predominates in the resulting solution. This is best explained by the fact that when [Cu(EDTA)]2– is formed from [Cu(NH3)4]2+ A there are much stronger bonds between the ligands and the copper(II) ...
... 10 When EDTA is added to [Cu(NH3)4]2+ in aqueous solution, the copper(II)-EDTA complex, [Cu(EDTA)]2–, predominates in the resulting solution. This is best explained by the fact that when [Cu(EDTA)]2– is formed from [Cu(NH3)4]2+ A there are much stronger bonds between the ligands and the copper(II) ...
Document
... Seawater is essentially 0.438 M NaCl and 0.0512 M MgCl 2, together with several other minor solutes. What are the molarities of Na+, Mg2+, and Cl– in seawater? ...
... Seawater is essentially 0.438 M NaCl and 0.0512 M MgCl 2, together with several other minor solutes. What are the molarities of Na+, Mg2+, and Cl– in seawater? ...
Click Here To File
... -There are 4 unpaired electrons. -Water is a weak ligand. Thus the hybridisation involved is sp3d2 (marks to be granted if hybridisation is depicted diagrammatically) (ii) The ionisation isomer is [Co(NH3)5SO4]Br. The IUPAC name is pentaamminesulphatocobalt(III)bromide. Chemical test to distinguish ...
... -There are 4 unpaired electrons. -Water is a weak ligand. Thus the hybridisation involved is sp3d2 (marks to be granted if hybridisation is depicted diagrammatically) (ii) The ionisation isomer is [Co(NH3)5SO4]Br. The IUPAC name is pentaamminesulphatocobalt(III)bromide. Chemical test to distinguish ...
Practice Bypass Answers
... It is an ionic compound. Aluminum is a metal that has three valence electrons and low attraction for electrons. In order for it to achieve stable octet it needs to lose these valence electrons (previous energy level has 8 electrons). Chlorine is a non-metal that has seven valence electrons. To achie ...
... It is an ionic compound. Aluminum is a metal that has three valence electrons and low attraction for electrons. In order for it to achieve stable octet it needs to lose these valence electrons (previous energy level has 8 electrons). Chlorine is a non-metal that has seven valence electrons. To achie ...
www.XtremePapers.com UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/03
... You should show the essential steps in any calculations and record experimental results in the spaces provided on the question paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. ...
... You should show the essential steps in any calculations and record experimental results in the spaces provided on the question paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. ...
chemistry 11 exam review
... 8. What pressure is needed to change 130 mL of gas at 740 torr to 150 mL? (641 torr) 9. What temperature change is needed to change 1.0 L of gas at 10.0C and 800.0 torr to 0.50 L and 760 torr? (-138C change to bring your final temperature to 134K) 10. A 1.0 L rubber bladder is filled with carbon d ...
... 8. What pressure is needed to change 130 mL of gas at 740 torr to 150 mL? (641 torr) 9. What temperature change is needed to change 1.0 L of gas at 10.0C and 800.0 torr to 0.50 L and 760 torr? (-138C change to bring your final temperature to 134K) 10. A 1.0 L rubber bladder is filled with carbon d ...
Hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It functions as a base, a ligand, a nucleophile and a catalyst. The hydroxide ion forms salts, some of which dissociate in aqueous solution, liberating solvated hydroxide ions. Sodium hydroxide is a multi-million-ton per annum commodity chemical. A hydroxide attached to a strongly electropositive center may itself ionize, liberating a hydrogen cation (H+), making the parent compound an acid.The corresponding electrically neutral compound •HO is the hydroxyl radical. The corresponding covalently-bound group -OH of atoms is the hydroxyl group.Hydroxide ion and hydroxyl group are nucleophiles and can act as a catalyst in organic chemistry.Many inorganic substances which bear the word ""hydroxide"" in their names are not ionic compounds of the hydroxide ion, but covalent compounds which contain hydroxyl groups.