Activity series
... Group Roles: A Technician; B Leader; C Recorder Redox reactions are some of the most common and most useful chemical reactions. They produce electrical current which can be harnessed to do work. Transition metals play a very important role in redox chemistry. Questions: Which metals are easily oxidi ...
... Group Roles: A Technician; B Leader; C Recorder Redox reactions are some of the most common and most useful chemical reactions. They produce electrical current which can be harnessed to do work. Transition metals play a very important role in redox chemistry. Questions: Which metals are easily oxidi ...
writing and balancing equations
... 1. Keep the polyatomic ions together on both sides 2. Balance the metal ions first, or if they are balanced, the polyatomic ions first, metals last If your formulas are correct, the equation should balance ...
... 1. Keep the polyatomic ions together on both sides 2. Balance the metal ions first, or if they are balanced, the polyatomic ions first, metals last If your formulas are correct, the equation should balance ...
Spontaniety
... forward direction. ◦ If ΔG is equal to zero, the reaction is at equilibrium. ◦ If ΔG is positive, then the reaction is nonspontaneous in the forward direction, but the reverse reaction will be spontaneous. ◦ For elements at standard state (pure elements at 25ºC and 1 atm are assigned a value of zero ...
... forward direction. ◦ If ΔG is equal to zero, the reaction is at equilibrium. ◦ If ΔG is positive, then the reaction is nonspontaneous in the forward direction, but the reverse reaction will be spontaneous. ◦ For elements at standard state (pure elements at 25ºC and 1 atm are assigned a value of zero ...
Chemistry 21 A - El Camino College
... f) Cr2O72-(aq) + 2H+(aq) + 3Mn2+(aq) → 2Cr3+(aq) + 3MnO2(s) + H2O(l) 14. Consider all of the following compounds to be water soluble and write the formulas of the ions that would be formed if the compoundes were disolved in water. a) LiNO3 b) Na2HPO4 c) Ca(ClO3)2 d) KOH e) MgBr2 f) (NH4)2SO4 15. In ...
... f) Cr2O72-(aq) + 2H+(aq) + 3Mn2+(aq) → 2Cr3+(aq) + 3MnO2(s) + H2O(l) 14. Consider all of the following compounds to be water soluble and write the formulas of the ions that would be formed if the compoundes were disolved in water. a) LiNO3 b) Na2HPO4 c) Ca(ClO3)2 d) KOH e) MgBr2 f) (NH4)2SO4 15. In ...
The topic that fascinated me the most in my Science lessons this
... electron is further away. It therefore loses its electron readily to a halogen atom (e.g. chlorine). Beryllium, a much smaller metal atom, can hold on to its valence electron when partnering a chlorine atom because its valence electron is nearer to the positively charged nucleus. Therefore, Berylli ...
... electron is further away. It therefore loses its electron readily to a halogen atom (e.g. chlorine). Beryllium, a much smaller metal atom, can hold on to its valence electron when partnering a chlorine atom because its valence electron is nearer to the positively charged nucleus. Therefore, Berylli ...
Define:
... 95. What is the charge of a cation? An anion? 96. Cations form when an atom ______ _______ and anions form when an atom ______ _______. 97. Write the electron configuration for the sodium ion? Oxide ion? 98. How many electrons does strontium have to give up to achieve noble gas configuration? 99. Wh ...
... 95. What is the charge of a cation? An anion? 96. Cations form when an atom ______ _______ and anions form when an atom ______ _______. 97. Write the electron configuration for the sodium ion? Oxide ion? 98. How many electrons does strontium have to give up to achieve noble gas configuration? 99. Wh ...
exam review - hrsbstaff.ednet.ns.ca
... dissolved in water and diluted to a final volume of 200.0 mL. b) Determine the volume of commercial grade nitric acid (15.8 mol/L HNO 3) that is needed to prepare 100.0 mL of 3.00 mol/L HNO3. c) Rubbing alcohol is commonly used as an antiseptic for small cuts. It is sold as a 23% (v/v) solution of i ...
... dissolved in water and diluted to a final volume of 200.0 mL. b) Determine the volume of commercial grade nitric acid (15.8 mol/L HNO 3) that is needed to prepare 100.0 mL of 3.00 mol/L HNO3. c) Rubbing alcohol is commonly used as an antiseptic for small cuts. It is sold as a 23% (v/v) solution of i ...
Role of Water as a Solvent
... hydroxide and potassium hydrogenphthalate (KHP) to standardize the base solution, by placing 50.00 mg of solid potassium hydrogenphthalate in a flask with a few drops of an indicator. A buret is filled with the base, and the initial buret reading is 0.55 ml; at the end of the titration the buret rea ...
... hydroxide and potassium hydrogenphthalate (KHP) to standardize the base solution, by placing 50.00 mg of solid potassium hydrogenphthalate in a flask with a few drops of an indicator. A buret is filled with the base, and the initial buret reading is 0.55 ml; at the end of the titration the buret rea ...
The Elements of Group 15 (5A, V, VA) The Nitrogen Group
... Phosphorus is a tetrameric solid (white phosphorus) in its standard state (P4(s)), although it exists as many allotropes. White phosphorus reacts with oxygen (combusts), so must be stored under water. Formerly used in matches. ...
... Phosphorus is a tetrameric solid (white phosphorus) in its standard state (P4(s)), although it exists as many allotropes. White phosphorus reacts with oxygen (combusts), so must be stored under water. Formerly used in matches. ...
Chapter 4:Chemical Quantities and Aqueous Reactions:
... oxidation numbers) a) balance atoms that change their oxidation numbers b) balance O by adding H2O c) balance H by adding H+ d) balance charges by including the electrons as products in the oxidation reaction and electrons as reactants in the reduction reaction e) If the solution is basic: add equal ...
... oxidation numbers) a) balance atoms that change their oxidation numbers b) balance O by adding H2O c) balance H by adding H+ d) balance charges by including the electrons as products in the oxidation reaction and electrons as reactants in the reduction reaction e) If the solution is basic: add equal ...
PowerPoint
... carbon, and that the equilibrium constants for all four reactions are known at the temperature of interest, develop the necessary equations and indicate how to use them in order to determine whether it is thermodynamically possible for carbon to form. In doing so, assume that the system initially co ...
... carbon, and that the equilibrium constants for all four reactions are known at the temperature of interest, develop the necessary equations and indicate how to use them in order to determine whether it is thermodynamically possible for carbon to form. In doing so, assume that the system initially co ...
Chemical Reactions are…
... Burning of wood results in products that appear to have less mass as ashes; where is the rest? Gases and smoke. ...
... Burning of wood results in products that appear to have less mass as ashes; where is the rest? Gases and smoke. ...
Vocab
... the outer shell An atom gains or loses electrons until it has 8 (or 0) in the outer shell Lewis Dot Structure ...
... the outer shell An atom gains or loses electrons until it has 8 (or 0) in the outer shell Lewis Dot Structure ...
Chapter one
... * 15-4 Explore - Colder then ice water - in this activity you have discovered what happens to the freezing point of water when a substance is dissolved ...
... * 15-4 Explore - Colder then ice water - in this activity you have discovered what happens to the freezing point of water when a substance is dissolved ...
Atomic Concepts
... 4. Bohr – nucleus surrounded by electrons in circular orbits 5. Atoms have a positive charged nucleus, surrounded by negatively charged electrons 6. Protons and neutrons are found in the nucleus 7. Protons are positive, neutrons have no charge, electrons are negative 8. In an atom, # protons = # ele ...
... 4. Bohr – nucleus surrounded by electrons in circular orbits 5. Atoms have a positive charged nucleus, surrounded by negatively charged electrons 6. Protons and neutrons are found in the nucleus 7. Protons are positive, neutrons have no charge, electrons are negative 8. In an atom, # protons = # ele ...
Name……………………………………............................. Index number
... 10. Chlorine gas is bubbled into an aqueous solution of potassium iodide (a) State the observation that would be made. ...
... 10. Chlorine gas is bubbled into an aqueous solution of potassium iodide (a) State the observation that would be made. ...
Test Booklet
... 56 This balanced equation represents a chemical reaction. 2C4 H10 (g) + 13O2 (g) → 8CO2 (g) + 10H2 O (g) What type of chemical reaction is represented by the equation? ...
... 56 This balanced equation represents a chemical reaction. 2C4 H10 (g) + 13O2 (g) → 8CO2 (g) + 10H2 O (g) What type of chemical reaction is represented by the equation? ...
makeup2
... freezes at -1.46°C. What is the molecular weight of x? (Kf = 1.86) (A) 84 x 1.86 x 1.46 = 222 g/mol (B) 84 x (1.86 / 1.46) = 107 g/mol (C) 84 x (1.46 / 1.86) = 66 g/mol (D) 1.46 x (1.86 / 84) = 0.032 g/mol 59. A 1.20 liter sample is drawn from a bottle labeled "86.0% by weight H2SO4, density 1.787 g ...
... freezes at -1.46°C. What is the molecular weight of x? (Kf = 1.86) (A) 84 x 1.86 x 1.46 = 222 g/mol (B) 84 x (1.86 / 1.46) = 107 g/mol (C) 84 x (1.46 / 1.86) = 66 g/mol (D) 1.46 x (1.86 / 84) = 0.032 g/mol 59. A 1.20 liter sample is drawn from a bottle labeled "86.0% by weight H2SO4, density 1.787 g ...
Atoms, Ions, and Molecules File
... Atoms of different elements are different. • Atoms are not changed into different atoms in a chemical reaction. • Compounds are formed when atoms of two or more elements combine. ...
... Atoms of different elements are different. • Atoms are not changed into different atoms in a chemical reaction. • Compounds are formed when atoms of two or more elements combine. ...
Final review free response ch 1-4
... 5. If you have 4 g NaOH, and 10 g HBr, what is the limiting reagent and how much salt is produced? In lab if you produce1 g salt, what is the percent yield? ...
... 5. If you have 4 g NaOH, and 10 g HBr, what is the limiting reagent and how much salt is produced? In lab if you produce1 g salt, what is the percent yield? ...
Chemical Equation Reactions
... molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually contains individual IONS, not molecules, in solution. By looking at the afo ...
... molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually contains individual IONS, not molecules, in solution. By looking at the afo ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.