- Jersey College For Girls
... (Total for question = 8 marks) Q2. When ammonia gas and hydrogen chloride gas mix, they react together to form a white solid called ammonium chloride. The equation for the reaction is: NH3(g) + HCl(g) → NH4Cl(s) A cotton wool pad was soaked in ammonia solution and another was soaked in hydrogen chlo ...
... (Total for question = 8 marks) Q2. When ammonia gas and hydrogen chloride gas mix, they react together to form a white solid called ammonium chloride. The equation for the reaction is: NH3(g) + HCl(g) → NH4Cl(s) A cotton wool pad was soaked in ammonia solution and another was soaked in hydrogen chlo ...
Practice Exam 3
... b. from He to Ca, stable nuclei have roughly equal numbers of protons and neutrons. c. isotopes with a low neutron to proton ratio always decay by alpha particle emission. d. the neutron to proton ratio in stable nuclei increases as mass increases. e. beyond calcium, the neutron to proton ratio is a ...
... b. from He to Ca, stable nuclei have roughly equal numbers of protons and neutrons. c. isotopes with a low neutron to proton ratio always decay by alpha particle emission. d. the neutron to proton ratio in stable nuclei increases as mass increases. e. beyond calcium, the neutron to proton ratio is a ...
Thermodynamics and kinetics
... Cu2+ + Zn <--> Cu + Zn2+ °=1.10 V nF [A]a [B]b 2 moles of electrons (n=2) ∆G =-2(96487C/mole e-)(1.10V) ∆G = -212 kJ/mol ...
... Cu2+ + Zn <--> Cu + Zn2+ °=1.10 V nF [A]a [B]b 2 moles of electrons (n=2) ∆G =-2(96487C/mole e-)(1.10V) ∆G = -212 kJ/mol ...
A2 Chemistry key word list
... A special type of E/Z isomerism in which each carbon of the C=C double bond carries the same atom or group: the cis isomer (Z isomer) has that group on each carbon on the same side; the trans isomer (E isomer) has that group on each carbon on different sides. ...
... A special type of E/Z isomerism in which each carbon of the C=C double bond carries the same atom or group: the cis isomer (Z isomer) has that group on each carbon on the same side; the trans isomer (E isomer) has that group on each carbon on different sides. ...
Learning Guide – Poisons (I)
... Meat turns brown when you cook it. Plants make sugar and oxygen from carbon dioxide and water. “Hot hands” get warm when bent. Old wine turns into vinegar. Paint remover loosens paint so it can be removed. Balancing chemical reactions When we write a chemical reaction, it is important to know how ma ...
... Meat turns brown when you cook it. Plants make sugar and oxygen from carbon dioxide and water. “Hot hands” get warm when bent. Old wine turns into vinegar. Paint remover loosens paint so it can be removed. Balancing chemical reactions When we write a chemical reaction, it is important to know how ma ...
Complex Ions and Free Energy
... form between metal ions and ligands. Furthermore, I can determine the coordination number for a coordination complex • LT 8.7 – I can calculate the formation constant for complex ions and relate that to the Ksp for a slightly soluble compound. • LT 8.8 – I can calculate the free energy of a chemical ...
... form between metal ions and ligands. Furthermore, I can determine the coordination number for a coordination complex • LT 8.7 – I can calculate the formation constant for complex ions and relate that to the Ksp for a slightly soluble compound. • LT 8.8 – I can calculate the free energy of a chemical ...
CHEM1405 2012-J-2 June 2012 • What is the ground state electron
... • The radioactive isotopes 131I and 137Cs have been detected in drinking water near the Japanese Fukushima nuclear reactor. They have half lives of 8 days and 30 years, respectively. What is the definition of half-life? Half-life is the amount of time required for the amount (or activity) of a sampl ...
... • The radioactive isotopes 131I and 137Cs have been detected in drinking water near the Japanese Fukushima nuclear reactor. They have half lives of 8 days and 30 years, respectively. What is the definition of half-life? Half-life is the amount of time required for the amount (or activity) of a sampl ...
Calculations with Chemical Formulas and Equations
... reaction to proceed by igniting the bubbles or balloons. The more H2O that is formed during the reaction, the bigger the bang. Explain the following observations. a. A bubble containing just H2 makes a quiet “fffft” sound when ignited. b. When a bubble containing equal amounts of H2 and O2 is ignite ...
... reaction to proceed by igniting the bubbles or balloons. The more H2O that is formed during the reaction, the bigger the bang. Explain the following observations. a. A bubble containing just H2 makes a quiet “fffft” sound when ignited. b. When a bubble containing equal amounts of H2 and O2 is ignite ...
F324 summary - Macmillan Academy
... Hydrolysis and degradable polymers • Condensation polymers have chemical groups that are vulnerable to chemical attack from either acids or alkalis – polyesters (ester group) and polyamides (amide group). This process is known as hydrolysis and results in the breakdown of the polymer. • Disposing o ...
... Hydrolysis and degradable polymers • Condensation polymers have chemical groups that are vulnerable to chemical attack from either acids or alkalis – polyesters (ester group) and polyamides (amide group). This process is known as hydrolysis and results in the breakdown of the polymer. • Disposing o ...
Balancing chemical equations notes
... chemicals are combined together and what chemicals are made when a reaction occurs. The law of conservation of mass says that matter can neither be created nor destroyed, and this requires that all chemical reactions be balanced. Consider the following balanced equation: Cu (s) + 4 HNO3 (aq) Cu(NO ...
... chemicals are combined together and what chemicals are made when a reaction occurs. The law of conservation of mass says that matter can neither be created nor destroyed, and this requires that all chemical reactions be balanced. Consider the following balanced equation: Cu (s) + 4 HNO3 (aq) Cu(NO ...
Regents Chemistry Review Questions
... In a solution of salt water, what is the solute? What is the solvent? What is molarity? What is the symbol for molarity? Describe how you would prepare 2L of a 10M sodium chloride solution. Describe how you would make a 0.5M solution of BaNO3 given 1L of 5M BaNO3. What is a precipitate? Is it solubl ...
... In a solution of salt water, what is the solute? What is the solvent? What is molarity? What is the symbol for molarity? Describe how you would prepare 2L of a 10M sodium chloride solution. Describe how you would make a 0.5M solution of BaNO3 given 1L of 5M BaNO3. What is a precipitate? Is it solubl ...
Enzymes: “Helper” Protein molecules
... sucrase breaks down sucrose proteases breakdown proteins lipases breakdown lipids DNA polymerase builds DNA ...
... sucrase breaks down sucrose proteases breakdown proteins lipases breakdown lipids DNA polymerase builds DNA ...
Elements, Compounds and Chemical Reactions
... • While the Periodic Table is HUGE, just a few of those elements make up most of our Earth. Take a look at these pie graphs! ...
... • While the Periodic Table is HUGE, just a few of those elements make up most of our Earth. Take a look at these pie graphs! ...
Section 11.1 Assessment How many mole ratios can be written for
... determines how much product can form. ...
... determines how much product can form. ...
Unit 14.1 REDOX Reactions Objectives REDOX Reactions
... • REDOX reactions involve the transfer of electrons from one species to another. • A REDOX reaction involves both an oxidation of one species and a reduction of another. • REDOX reactions can be used to convert chemical potential energy into electrical energy. ...
... • REDOX reactions involve the transfer of electrons from one species to another. • A REDOX reaction involves both an oxidation of one species and a reduction of another. • REDOX reactions can be used to convert chemical potential energy into electrical energy. ...
1996 Free Response Answers
... Hypochlorous acid, HOCl, is a weak acid commonly used as a bleaching agent. The aciddissociation constant, Ka, for the reaction represented above is 3.2 x 10¯8. (a) Calculate the [H+] of a 0.14-molar solution of HOCl. (b) Write the correctly balanced net ionic equation for the reaction that occurs ...
... Hypochlorous acid, HOCl, is a weak acid commonly used as a bleaching agent. The aciddissociation constant, Ka, for the reaction represented above is 3.2 x 10¯8. (a) Calculate the [H+] of a 0.14-molar solution of HOCl. (b) Write the correctly balanced net ionic equation for the reaction that occurs ...
+ H 2 O(l )
... Oxidation-Reduction (Redox) Reactions Oxidation Number (State): A value which indicates whether an atom is neutral, electronrich, or electron-poor. Rules for Assigning Oxidation Numbers 1. An atom in its elemental state has an oxidation number of 0. ...
... Oxidation-Reduction (Redox) Reactions Oxidation Number (State): A value which indicates whether an atom is neutral, electronrich, or electron-poor. Rules for Assigning Oxidation Numbers 1. An atom in its elemental state has an oxidation number of 0. ...