Stoichiometry Notes
... In any balanced equation, the moles of one chemical is related to the moles of another chemical by the stoichiometric ratio. We can use this concept to make important practical predictions regarding a chemical reaction. In the “moles” unit, we learned that the MOLE can be used to make calculations d ...
... In any balanced equation, the moles of one chemical is related to the moles of another chemical by the stoichiometric ratio. We can use this concept to make important practical predictions regarding a chemical reaction. In the “moles” unit, we learned that the MOLE can be used to make calculations d ...
Stage 2 Chemistry Intended Student Learning 2014
... Topic 1: Elemental and Environmental Chemistry This topic deals with some of the underlying principles of chemistry (‘elemental chemistry’) and then considers the chemistry of the environment. The elemental chemistry component of the topic focuses on the periodic table and the concept of electroneg ...
... Topic 1: Elemental and Environmental Chemistry This topic deals with some of the underlying principles of chemistry (‘elemental chemistry’) and then considers the chemistry of the environment. The elemental chemistry component of the topic focuses on the periodic table and the concept of electroneg ...
Questions
... Calculate the volume of gas produced if 3.0 g of sodium reacts with an excess of water. (One mole of any gas at the temperature and pressure of the experiment occupies 24 dm3.) ...
... Calculate the volume of gas produced if 3.0 g of sodium reacts with an excess of water. (One mole of any gas at the temperature and pressure of the experiment occupies 24 dm3.) ...
Solubility
... Uncommon Ion (Salt) Effect Observation: If NaNO3 salt is added to AgCl precipitate, it’s solubility can be increased dramatically. There is no chemical reaction with the NaNO3, so what is going on? Thus far we have used molar concentrations in Ksp and other equilibrium expressions, but this is an a ...
... Uncommon Ion (Salt) Effect Observation: If NaNO3 salt is added to AgCl precipitate, it’s solubility can be increased dramatically. There is no chemical reaction with the NaNO3, so what is going on? Thus far we have used molar concentrations in Ksp and other equilibrium expressions, but this is an a ...
OCR answers to the examination questions File
... (b) (i) Add Tollens’ reagent. Heat reaction in a water bath. But-2-enal gives a silver precipitate or silver mirror. (ii) Aldehydes can be oxidised but ketones cannot. (c) (i) CH3CH=CHCH2OH (ii) Redox reaction/reduction or addition. (d) C4H6O + 5O2 → 4CO2 + 3H2O 7 (a) (i) ...
... (b) (i) Add Tollens’ reagent. Heat reaction in a water bath. But-2-enal gives a silver precipitate or silver mirror. (ii) Aldehydes can be oxidised but ketones cannot. (c) (i) CH3CH=CHCH2OH (ii) Redox reaction/reduction or addition. (d) C4H6O + 5O2 → 4CO2 + 3H2O 7 (a) (i) ...
![[edit]Occurrence in solution](http://s1.studyres.com/store/data/009755146_1-58e56f0cc08d3d020872dbc6c3acbb66-300x300.png)
[edit]Occurrence in solution
... Despite its prevalence in the environment, aluminium salts are not known to be used by any form of life. In keeping with its pervasiveness, it is well tolerated by plants and animals. [5] Because of their prevalence, potential beneficial (or otherwise) biological roles of aluminium compounds are of ...
... Despite its prevalence in the environment, aluminium salts are not known to be used by any form of life. In keeping with its pervasiveness, it is well tolerated by plants and animals. [5] Because of their prevalence, potential beneficial (or otherwise) biological roles of aluminium compounds are of ...
Colligative Properties
... The treatment of osmotic pressure is not identical to the treatments of boiling point elevation and freezing point depression we have just given. A cartoon of an osmotic pressure apparatus is shown below. A U-tube has a "semipermeable membrane inserted in the center of the cross piece as shown. (A s ...
... The treatment of osmotic pressure is not identical to the treatments of boiling point elevation and freezing point depression we have just given. A cartoon of an osmotic pressure apparatus is shown below. A U-tube has a "semipermeable membrane inserted in the center of the cross piece as shown. (A s ...
Water-Mediated Dimerization of Ubiquitin Ions Captured by
... monomers, indicating the successful capture of a watermediated binding event responsible for dictating the conformational preferences of ubiquitin ions. Ubiquitin is a 76 amino acid regulatory protein that is conserved in all eukaryotic cells in all species. Its function varies and is determined by ...
... monomers, indicating the successful capture of a watermediated binding event responsible for dictating the conformational preferences of ubiquitin ions. Ubiquitin is a 76 amino acid regulatory protein that is conserved in all eukaryotic cells in all species. Its function varies and is determined by ...
effect of inorganic ions on the oxidation of dichlorvos insecticide with
... first stage is 15.8%, as seen in Figure 2. It may be derived that FeH,PO,+ possibly reacts with hydrogen peroxide and produces radicals. It is still possible to oxidize dichlorvos in the first stage. In the second stage, FeH,P0,2’reacts ...
... first stage is 15.8%, as seen in Figure 2. It may be derived that FeH,PO,+ possibly reacts with hydrogen peroxide and produces radicals. It is still possible to oxidize dichlorvos in the first stage. In the second stage, FeH,P0,2’reacts ...
Mathematical Modeling of the Formation of Calcareous
... the influence of physics and chemistry of seawater, cathodic protection, and surface preparation on the formation of calcareous deposits through electrochemical experiments in natural seawater 512 and in artificial seawater. 13-~4 However, there are very few papers regarding mathematical modeling of ...
... the influence of physics and chemistry of seawater, cathodic protection, and surface preparation on the formation of calcareous deposits through electrochemical experiments in natural seawater 512 and in artificial seawater. 13-~4 However, there are very few papers regarding mathematical modeling of ...
E2 and E11 Acid Deposition Past Paper Questions
... (a) carbonic acid is a weak acid / only partially dissociated / low solubility; the pH must be lower than 5.6 for acid rain / OWTTE; (b) H2SO3 / H2SO4 and burning coal / sulfur-containing fuels / smelting of sulfide ores; HNO2 / HNO3 and reaction (between N2 and O2) in internal combustion/jet engine ...
... (a) carbonic acid is a weak acid / only partially dissociated / low solubility; the pH must be lower than 5.6 for acid rain / OWTTE; (b) H2SO3 / H2SO4 and burning coal / sulfur-containing fuels / smelting of sulfide ores; HNO2 / HNO3 and reaction (between N2 and O2) in internal combustion/jet engine ...
Chapter 4 Chemical Quantities and Aqueous Reactions
... disappear, or become a liquid - the composition can vary from one sample to another. Pure substances have constant composition. Salt water samples from different seas or lakes have different amounts of salt ...
... disappear, or become a liquid - the composition can vary from one sample to another. Pure substances have constant composition. Salt water samples from different seas or lakes have different amounts of salt ...
Sulfuric Acid
... above, dry air is used in the combustion process. Water will cause corrosion because of acid formation. If sulfur contains carbonaceous impurities, the molten material has to be filtered to avoid poisoning the catalyst and forming water from burning hydrogen. Step 2. When using sulfur from sources 1 ...
... above, dry air is used in the combustion process. Water will cause corrosion because of acid formation. If sulfur contains carbonaceous impurities, the molten material has to be filtered to avoid poisoning the catalyst and forming water from burning hydrogen. Step 2. When using sulfur from sources 1 ...
Summary - Clydebank High School
... the outer energy level are shared there are ........................................... electrons which makes it an electrical ............................................ 7. Silicon carbide (SiC) has a giant covalent ....................................... structure. This makes silicon carbide very ...
... the outer energy level are shared there are ........................................... electrons which makes it an electrical ............................................ 7. Silicon carbide (SiC) has a giant covalent ....................................... structure. This makes silicon carbide very ...
Name - Piscataway High School
... Temperature (which means the average kinetic energy of the molecule) can be measured using three common scales: Celsius, Kelvin, and Fahrenheit. We use the following formulas to convert form one scale to another. Celsius is the scale most desirable for laboratory work. Kelvin represents the absolute ...
... Temperature (which means the average kinetic energy of the molecule) can be measured using three common scales: Celsius, Kelvin, and Fahrenheit. We use the following formulas to convert form one scale to another. Celsius is the scale most desirable for laboratory work. Kelvin represents the absolute ...
10. Factors Affecting the Rate of a Chemical Reaction
... more rapidly, which means that they collide more frequently, but more importantly, that they collide with GREATER ENERGY. Higher energy collisions are more likely to be effective collisions, and lead to the rearrangement of atoms and the formation of products. 4. Presence of a Catalyst A substance t ...
... more rapidly, which means that they collide more frequently, but more importantly, that they collide with GREATER ENERGY. Higher energy collisions are more likely to be effective collisions, and lead to the rearrangement of atoms and the formation of products. 4. Presence of a Catalyst A substance t ...
Spring 2013 Semester Exam Study Guide (Bonding, Nomenclature
... ____ 38. Metals are malleable because the metallic bonding a. holds the layers of ions in rigid positions. b. maximizes the repulsive forces within the metal. c. allows one plane of ions to slide past another. d. is easily broken. ____ 39. Shifting the layers of an ionic crystal causes the crystal t ...
... ____ 38. Metals are malleable because the metallic bonding a. holds the layers of ions in rigid positions. b. maximizes the repulsive forces within the metal. c. allows one plane of ions to slide past another. d. is easily broken. ____ 39. Shifting the layers of an ionic crystal causes the crystal t ...
CHEMICAL REACTIONS Chapter 4
... 4 Al atoms + 3 O2 molecules ------> 2 formula units of Al2O3 4 moles of Al + 3 moles of O2 ----> 2 moles of Al2O3 ...
... 4 Al atoms + 3 O2 molecules ------> 2 formula units of Al2O3 4 moles of Al + 3 moles of O2 ----> 2 moles of Al2O3 ...
Questions - Chemistry Teaching Resources
... copper(II) nitrate is completely decomposed on heating. ...
... copper(II) nitrate is completely decomposed on heating. ...
PH
In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.pH measurements are important in medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, nutrition, water treatment & water purification, and many other applications. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement.Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode.The pH of aqueous solutions can be measured with a glass electrode and a pH meter, or indicator.pH is the negative of the logarithm to base 10 of the activity of the (solvated) hydronium ion, more often (albeit somewhat inaccurately) expressed as the measure of the hydronium ion concentration.The rest of this article uses the technically correct word ""base"" and its inflections in place of ""alkaline"", which specifically refers to a base dissolved in water, and its inflections.