REACTION PREDICTION
... Two compounds react to form two new compounds. All double replacement reactions must have a "driving force" that removes a pair of ions from solution. Ions keep their same charges as reactants and products. Formation of a precipitate: A precipitate is an insoluble substance formed by the reaction of ...
... Two compounds react to form two new compounds. All double replacement reactions must have a "driving force" that removes a pair of ions from solution. Ions keep their same charges as reactants and products. Formation of a precipitate: A precipitate is an insoluble substance formed by the reaction of ...
153KB PDF - Clydeview Academy
... 4 If any of this information is wrong, tell the Invigilator immediately. 5 If this information is correct, print your name and seat number in the boxes provided. 6 The answer to each question is either A, B, C or D. Decide what your answer is, then, using your pencil, put a horizontal line in the sp ...
... 4 If any of this information is wrong, tell the Invigilator immediately. 5 If this information is correct, print your name and seat number in the boxes provided. 6 The answer to each question is either A, B, C or D. Decide what your answer is, then, using your pencil, put a horizontal line in the sp ...
SC 119 PRACTICE Assessment:
... interparticle forces between two molecules of propane and interparticle forces between two molecules of water and use these analyses to support your answer. ...
... interparticle forces between two molecules of propane and interparticle forces between two molecules of water and use these analyses to support your answer. ...
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? ...
Sample Paper Chemistry - Educomp Solutions Ltd.
... Elevation in boiling point is a colligative property which depends on the number of particles. NaCl is an ionic compound which dissociates in solution to give more number of particles whereas sugar is made up of molecules and ...
... Elevation in boiling point is a colligative property which depends on the number of particles. NaCl is an ionic compound which dissociates in solution to give more number of particles whereas sugar is made up of molecules and ...
am 06 chemistry - University of Malta
... (c) Calculate a value for the equilibrium constant Kp for the reaction at 1000 K, stating its units. Kp = pp2 NH3 pp N2 x pp3 H2 deduct ½ mark if square brackets are used ...
... (c) Calculate a value for the equilibrium constant Kp for the reaction at 1000 K, stating its units. Kp = pp2 NH3 pp N2 x pp3 H2 deduct ½ mark if square brackets are used ...
Chemistry - Delhi Public School, Faridabad
... How is the formal charge on an atom in a molecule/ion calculated? Explain taking the example of ozone molecule. ...
... How is the formal charge on an atom in a molecule/ion calculated? Explain taking the example of ozone molecule. ...
Atoms, Molecules and Ions - Moodle @ FCT-UNL
... (b) There are two silicon atoms and six bromine atoms present, so the formula is Si2Br6. ...
... (b) There are two silicon atoms and six bromine atoms present, so the formula is Si2Br6. ...
Chapter 2 PowerPoint
... (b) There are two silicon atoms and six bromine atoms present, so the formula is Si2Br6. ...
... (b) There are two silicon atoms and six bromine atoms present, so the formula is Si2Br6. ...
Name:__Grading key
... The electronegativity of phosphorous (P) is greater than the electronegativity of boron (B). Predict the comparative pH of 0.10 M H3PO3 and 0.10 M H3BO3. Indicate (circle) if the pH of 0.10 M H3PO3 is ...
... The electronegativity of phosphorous (P) is greater than the electronegativity of boron (B). Predict the comparative pH of 0.10 M H3PO3 and 0.10 M H3BO3. Indicate (circle) if the pH of 0.10 M H3PO3 is ...
Practice Exam #2
... is __________, and therefore heat is __________ by the reaction. A) exothermic, released B) exothermic, absorbed C) endothermic, absorbed D) endothermic, released E) thermoneutral, neither released nor absorbed 17) The value of ΔE for a system that performs 213 kJ of work on its surroundings and los ...
... is __________, and therefore heat is __________ by the reaction. A) exothermic, released B) exothermic, absorbed C) endothermic, absorbed D) endothermic, released E) thermoneutral, neither released nor absorbed 17) The value of ΔE for a system that performs 213 kJ of work on its surroundings and los ...
Worksheet: Acid base problems - AP level
... Example #10: If 0.50 moles Ca(OH)2 is slurried in 0.50 L deionized water and treated with 0.50 moles of CO2 gas in a closed system, the liquid phase of this system will have a pH closest to what value? Solution: After the Ca(OH)2 and the CO2 react, we are left with some calcium carbonate, an insolub ...
... Example #10: If 0.50 moles Ca(OH)2 is slurried in 0.50 L deionized water and treated with 0.50 moles of CO2 gas in a closed system, the liquid phase of this system will have a pH closest to what value? Solution: After the Ca(OH)2 and the CO2 react, we are left with some calcium carbonate, an insolub ...
New AQA C3 revison guide
... 2) They are diatomic (F2, Cl2, Br2 etc.) 3) All elements have 7 electrons in the outer shell: F: 2.7 Cl: 2.8.7 Br: 2.8.18.7 etc. 4) For this reason they all form 1- ions when they react with metals Ions are F-, Cl-, Br- etc. (They get the extra electron by sharing if they combine with another non-me ...
... 2) They are diatomic (F2, Cl2, Br2 etc.) 3) All elements have 7 electrons in the outer shell: F: 2.7 Cl: 2.8.7 Br: 2.8.18.7 etc. 4) For this reason they all form 1- ions when they react with metals Ions are F-, Cl-, Br- etc. (They get the extra electron by sharing if they combine with another non-me ...
Chemistry 20 Lesson 36 – The Whole Enchilada
... Aluminum metal is added to a copper (II) sulfate solution. ...
... Aluminum metal is added to a copper (II) sulfate solution. ...
File - Mrs. Pisciotta`s Biology Classes
... Why is carbon so interesting that a whole branch of chemistry should be set aside just to study carbon compounds? There are two reasons for this. First, carbon atoms have four valence electrons, allowing them to form strong covalent bonds with many other elements. Carbon can bond with many elements, ...
... Why is carbon so interesting that a whole branch of chemistry should be set aside just to study carbon compounds? There are two reasons for this. First, carbon atoms have four valence electrons, allowing them to form strong covalent bonds with many other elements. Carbon can bond with many elements, ...
2-3
... Why is carbon so interesting that a whole branch of chemistry should be set aside just to study carbon compounds? There are two reasons for this. First, carbon atoms have four valence electrons, allowing them to form strong covalent bonds with many other elements. Carbon can bond with many elements, ...
... Why is carbon so interesting that a whole branch of chemistry should be set aside just to study carbon compounds? There are two reasons for this. First, carbon atoms have four valence electrons, allowing them to form strong covalent bonds with many other elements. Carbon can bond with many elements, ...
Topic 8 Acids and Bases File
... Conductivity: The more a solution is dissociated into its ions, the greater its conductivity. Conjugate: The species remaining after an acid has lost a proton (conjugate base) or a base has gained one (conjugate acid). pKa + pKb = pKw Diprotic: Where one mole of an acid produces two moles of hydroge ...
... Conductivity: The more a solution is dissociated into its ions, the greater its conductivity. Conjugate: The species remaining after an acid has lost a proton (conjugate base) or a base has gained one (conjugate acid). pKa + pKb = pKw Diprotic: Where one mole of an acid produces two moles of hydroge ...
THE CHEMICAL BASIS OF LIFE
... • Organisms are sensitive to the hydrogen ion concentration [H ] of solutions, which can be indicated using the pH scale. 14. In each of the pairs of statements that follow, place a check next to the one that correctly describes how hydrogen bonding affects the properties of water. Hydrogen bondin ...
... • Organisms are sensitive to the hydrogen ion concentration [H ] of solutions, which can be indicated using the pH scale. 14. In each of the pairs of statements that follow, place a check next to the one that correctly describes how hydrogen bonding affects the properties of water. Hydrogen bondin ...
Chapter 4 Student Notes
... A redox equation is balanced if: it is balanced for atoms on each side. the total electrons lost and gained are equal. the reducing agent: the oxidizing agent: Our equation now looks like this: ...
... A redox equation is balanced if: it is balanced for atoms on each side. the total electrons lost and gained are equal. the reducing agent: the oxidizing agent: Our equation now looks like this: ...
Acid
An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. Aqueous solutions of acids have a pH of less than 7. Non-aqueous acids are usually formed when an anion (negative ion) reacts with one or more positively charged hydrogen cations. A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.Common examples of acids include hydrochloric acid (a solution of hydrogen chloride which is found in gastric acid in the stomach and activates digestive enzymes), acetic acid (vinegar is a dilute solution of this liquid), sulfuric acid (used in car batteries), and tartaric acid (a solid used in baking). As these examples show, acids can be solutions or pure substances, and can be derived from solids, liquids, or gases. Strong acids and some concentrated weak acids are corrosive, but there are exceptions such as carboranes and boric acid.