Metals
... Many compounds, particularly ionic compounds (eg: NaCl) exist as an array of ions or atoms bound to each other but with no recognisable molecules. The formula NaCl instead tells us that throughout a sample of NaCl sodium and chlorine atoms are present in the ratio 1:1. Because ionic compounds do not ...
... Many compounds, particularly ionic compounds (eg: NaCl) exist as an array of ions or atoms bound to each other but with no recognisable molecules. The formula NaCl instead tells us that throughout a sample of NaCl sodium and chlorine atoms are present in the ratio 1:1. Because ionic compounds do not ...
Chapter 25 - Houston ISD
... • In contrast, the terms dilute and concentrated are used to indicate the concentration of a solution, which is the amount of acid or base dissolved in the solution. ...
... • In contrast, the terms dilute and concentrated are used to indicate the concentration of a solution, which is the amount of acid or base dissolved in the solution. ...
Atomic Theory (2
... 12.) What is the difference between an excited state and ground state? 13.) Describe the limitations of the Bohr’s model of the atom and how quantum model provides a more accurate picture of electron arrangement. . ...
... 12.) What is the difference between an excited state and ground state? 13.) Describe the limitations of the Bohr’s model of the atom and how quantum model provides a more accurate picture of electron arrangement. . ...
Question Paper - Revision Science
... (Total for Question 2 = 4 marks) 3 Which of the following mixtures would form the best buffer solution with pH 9 for use in a school laboratory? A Ethanoic acid and sodium ethanoate B Sodium chloride and sodium hydroxide C Hydrocyanic acid and sodium cyanide D Ammonium chloride and ammonia (Total fo ...
... (Total for Question 2 = 4 marks) 3 Which of the following mixtures would form the best buffer solution with pH 9 for use in a school laboratory? A Ethanoic acid and sodium ethanoate B Sodium chloride and sodium hydroxide C Hydrocyanic acid and sodium cyanide D Ammonium chloride and ammonia (Total fo ...
Related concepts Concentration cells without transport
... The e.m.f. is the difference between the cathode potential (right half-cell R) and the anode potential (left half-cell L) and is always positive, otherwise the process runs in the other direction. The cathode is the electrode with the higher potential. It is the positive pole in a galvanic cell. The ...
... The e.m.f. is the difference between the cathode potential (right half-cell R) and the anode potential (left half-cell L) and is always positive, otherwise the process runs in the other direction. The cathode is the electrode with the higher potential. It is the positive pole in a galvanic cell. The ...
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 ...
Experiment #5 WHERE`S THE EVIDENCE
... A physical property is a characteristic of a substance that can be observed without changing the substance into another substance. The temperature at which a solid melts is a physical property. Color, hardness, and texture are other physical properties. A chemical property is a characteristic of a s ...
... A physical property is a characteristic of a substance that can be observed without changing the substance into another substance. The temperature at which a solid melts is a physical property. Color, hardness, and texture are other physical properties. A chemical property is a characteristic of a s ...
Answer Key, Problem Set 6 – complete, with explanations
... ions, I have shown the ions as “touching” here—you could have shown them with a bit of space in between them as well, as long as the amount of space in between was roughly “equal” for all adjacent ions). To further ...
... ions, I have shown the ions as “touching” here—you could have shown them with a bit of space in between them as well, as long as the amount of space in between was roughly “equal” for all adjacent ions). To further ...
Chapter 3. Analysis of Environmental System 3.1 Analysis of a
... Reaction equation (3.2.1) means that a moles of material A and b moles of material B react chemically to produce c moles of material C, and d moles of material D. At the same time, c moles of material C and d moles of material D react to produce a mole of material A, and b moles of material B. To un ...
... Reaction equation (3.2.1) means that a moles of material A and b moles of material B react chemically to produce c moles of material C, and d moles of material D. At the same time, c moles of material C and d moles of material D react to produce a mole of material A, and b moles of material B. To un ...
Equilibrium Review worksheet
... substances involved in this equilibrium. The vessel is heated to 650 °C. Determine the equilibrium amount concentrations of each substance, organizing your values in an ICE table. (Hint: use the value of Kc to determine which side of the reaction is favored, and therefore which substances will incre ...
... substances involved in this equilibrium. The vessel is heated to 650 °C. Determine the equilibrium amount concentrations of each substance, organizing your values in an ICE table. (Hint: use the value of Kc to determine which side of the reaction is favored, and therefore which substances will incre ...
107 - Bossier Parish Community College
... 13. recognize the interrelationship of the structure of matter and its chemical and physical properties. (B,C) 14. differentiate between intensive and extensive properties. (B,C) 15. determine if a change in matter is physical or chemical. (B,C) 16. recognize and differentiate the characteristics o ...
... 13. recognize the interrelationship of the structure of matter and its chemical and physical properties. (B,C) 14. differentiate between intensive and extensive properties. (B,C) 15. determine if a change in matter is physical or chemical. (B,C) 16. recognize and differentiate the characteristics o ...
AP Chemistry Summer Assignment
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
AP Chemistry Summer Assignment
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
AP Chemistry Summer Assignment
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
... to ensure the best start for everyone next fall, I have prepared a summer assignment that reviews basic chemistry concepts. There is a multitude of tremendous chemistry resources are available via the Internet. With the ready access to hundreds of websites either in your home or at the local library ...
Chem EOC Review Cumulative Free Response
... 268) Harder one. Aqueous solutions of barium chloride and sodium sulfate react to form a barium sulfate precipitate. Write the complete and net ionic equation. (HINT: You guys messed this up on the CRT. Write ...
... 268) Harder one. Aqueous solutions of barium chloride and sodium sulfate react to form a barium sulfate precipitate. Write the complete and net ionic equation. (HINT: You guys messed this up on the CRT. Write ...
TIPS for NET-IONIC EQUATIONS A.P. Chemistry (long form)
... 1. acids (formulas begin with H except for organic acids which can be written starting with H, but are often written ending in -COOH) 2. bases (ionic compounds ending in OH except for ammonia, NH3, and organic bases which are similar to ammonia and contain nitrogen) 3. metal oxides (binary compounds ...
... 1. acids (formulas begin with H except for organic acids which can be written starting with H, but are often written ending in -COOH) 2. bases (ionic compounds ending in OH except for ammonia, NH3, and organic bases which are similar to ammonia and contain nitrogen) 3. metal oxides (binary compounds ...
Covalent Bonding - whitburnscience
... O2-(1) Na+(2). This could be written as ONa2. But due to convention the positive ion, ie the hydrogen or metal is named first and it would be written as Na2O. If you know the charge on each of the ions you can easily work out the chemical formula. The way to do this is to cross multiply. So if the n ...
... O2-(1) Na+(2). This could be written as ONa2. But due to convention the positive ion, ie the hydrogen or metal is named first and it would be written as Na2O. If you know the charge on each of the ions you can easily work out the chemical formula. The way to do this is to cross multiply. So if the n ...
Analysing Acids and Bases
... The base – is a proton (H+) acceptor An acid-base reaction involves two conjugate acid-base pairs. ...
... The base – is a proton (H+) acceptor An acid-base reaction involves two conjugate acid-base pairs. ...
Periodic Properties of the Elements Effective Nuclear Charge, Zeff
... first ionization energy decreases down a column. The outer electrons are in higher principle quantum shells and are further from the nucleus. Less attraction to the nucleus thus easier to remove. We see some exceptions however. For example, IE1 of N is greater than IE1 of O. Why? Half-filled p-suble ...
... first ionization energy decreases down a column. The outer electrons are in higher principle quantum shells and are further from the nucleus. Less attraction to the nucleus thus easier to remove. We see some exceptions however. For example, IE1 of N is greater than IE1 of O. Why? Half-filled p-suble ...
Topic 11: Metals - Eastbank Academy
... Pupils should be encouraged to identify the presence and use of metals in the world around them. The social and industrial importance of the metal industry should be discussed, including the finite nature of metal sources and the need for re-cycling. Pupils should be aware that over threequarters of ...
... Pupils should be encouraged to identify the presence and use of metals in the world around them. The social and industrial importance of the metal industry should be discussed, including the finite nature of metal sources and the need for re-cycling. Pupils should be aware that over threequarters of ...
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.