Unit 5 Notes
... When the addition of S2O32- has reacted most of the I2 present, the brown colour of the I2 almost disappears (a diluted colour appearing pale yellow remains). Some starch solution is then added to the titration, which produces a dark blue colour (this is caused by the reaction between starch and the ...
... When the addition of S2O32- has reacted most of the I2 present, the brown colour of the I2 almost disappears (a diluted colour appearing pale yellow remains). Some starch solution is then added to the titration, which produces a dark blue colour (this is caused by the reaction between starch and the ...
Chemistry 520 - Problem Set 2
... (b) Next a sample of the sugar D-ribose (C5 H10 O5) of mass 0.727 g was placed in the same bomb calorimeter and then ignited in the presence of excess oxygen. The temperature of the calorimeter rose by 0.910 K. What is E for the combustion of D-ribose? [The products of the reaction are CO2 (g) and ...
... (b) Next a sample of the sugar D-ribose (C5 H10 O5) of mass 0.727 g was placed in the same bomb calorimeter and then ignited in the presence of excess oxygen. The temperature of the calorimeter rose by 0.910 K. What is E for the combustion of D-ribose? [The products of the reaction are CO2 (g) and ...
chp0-Intro
... – Bonding reqirements unsatisfied, react to form more stable state – Molecules are ‘teared apart’ via photodissociation ...
... – Bonding reqirements unsatisfied, react to form more stable state – Molecules are ‘teared apart’ via photodissociation ...
Reactions (The Basics)
... Double Replacement Reactions Generally take place between two ionic compounds in aqueous solution Generally 3 things happen: ...
... Double Replacement Reactions Generally take place between two ionic compounds in aqueous solution Generally 3 things happen: ...
Calculations Booklet
... 14.9g of potassium chloride, KCl, is dissolved in 0.2kg of water. The temperature falls from 22.5oC to 18.5oC. Calculate the enthalpy of solution of potassium chloride. 0.05 mol of a compound is dissolved in 500cm3 of water causing the temperature to rise from 19oC to 21oC. Find the enthalpy of solu ...
... 14.9g of potassium chloride, KCl, is dissolved in 0.2kg of water. The temperature falls from 22.5oC to 18.5oC. Calculate the enthalpy of solution of potassium chloride. 0.05 mol of a compound is dissolved in 500cm3 of water causing the temperature to rise from 19oC to 21oC. Find the enthalpy of solu ...
Question 1. Phosgene was used during the World War - IQ
... at the same temperature. After dissolution of the salt the final temperature was 23.34 o C. Consider that the specific heat capacity of the solution is 4.18 J oC-1g-1 and no energy was lost by the system: (a) Explain if the dissolution reaction of this salt is exothermic or endothermic. (b) Compute ...
... at the same temperature. After dissolution of the salt the final temperature was 23.34 o C. Consider that the specific heat capacity of the solution is 4.18 J oC-1g-1 and no energy was lost by the system: (a) Explain if the dissolution reaction of this salt is exothermic or endothermic. (b) Compute ...
Exam #2
... 73. Adding water to some chemicals can be dangerous because large amounts of heat are liberated. Which of the following does NOT liberate heat when water is added to it? ...
... 73. Adding water to some chemicals can be dangerous because large amounts of heat are liberated. Which of the following does NOT liberate heat when water is added to it? ...
Test: "Chemical Equations" (General Chemistry)
... d. equation for the reaction is balanced 22. In a balanced chemical equation, the coefficients are important because they: a. define the chemical properties of the substances b. tell whether the reaction is exothermic or endothermic c. give the ratios for all of the chemicals in the reaction d. tell ...
... d. equation for the reaction is balanced 22. In a balanced chemical equation, the coefficients are important because they: a. define the chemical properties of the substances b. tell whether the reaction is exothermic or endothermic c. give the ratios for all of the chemicals in the reaction d. tell ...
Note
... 1. pure water spontaneously dissociates into H+ ions and OH- ions a. acids are substances that donate protons or H+ ions to bases i. the greater the concentration of H+ ions, the more acidic the solution b. bases are substances that accept protons or H+ ions from acids i. often have OH- ions ii. the ...
... 1. pure water spontaneously dissociates into H+ ions and OH- ions a. acids are substances that donate protons or H+ ions to bases i. the greater the concentration of H+ ions, the more acidic the solution b. bases are substances that accept protons or H+ ions from acids i. often have OH- ions ii. the ...
Sec 5.8 - 5.11 notes
... ***What is the effect of the oxidation potential of the cell if the [OH-] is decreased around the anode? ...
... ***What is the effect of the oxidation potential of the cell if the [OH-] is decreased around the anode? ...
File
... Directions: Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT. _____ 13. In a decomposition reaction, there is a single reactant. _____ 14. The activity series of metals can be used to predict products in double-replacement reactions. _____ 15. Carbon dioxid ...
... Directions: Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT. _____ 13. In a decomposition reaction, there is a single reactant. _____ 14. The activity series of metals can be used to predict products in double-replacement reactions. _____ 15. Carbon dioxid ...
Section II - School District 27J
... solution. Determine the molar mass of the acid if the sample required 45.00 mL of 0.1000 M sodium hydroxide to reach its endpoint. c. What is the molecular formula for this acid? (EC ~ NAME IT!) ...
... solution. Determine the molar mass of the acid if the sample required 45.00 mL of 0.1000 M sodium hydroxide to reach its endpoint. c. What is the molecular formula for this acid? (EC ~ NAME IT!) ...
Key - GCC
... 5. List one nonelectrolyte from Table 4.1 and describe/draw how it reacts when placed in water. Does not dissociate in water. Ex: C6H12O6 will stay bonded together as a complete molecule when placed in water. When sugar dissolves in water, molecules become separated from each other, but the molecule ...
... 5. List one nonelectrolyte from Table 4.1 and describe/draw how it reacts when placed in water. Does not dissociate in water. Ex: C6H12O6 will stay bonded together as a complete molecule when placed in water. When sugar dissolves in water, molecules become separated from each other, but the molecule ...
4.1 & 4.2 LDP and R.A.M
... -Now, Dalton used hydrogen first because it was the lightest element and gave it a mass of 1. -he compared all the other element to this value For ex. : when Dalton looked at water, he saw thta 1 g of hydrogen combined with 8 g oxygen -so he gave oxygen a mass of 8 -this was a mistake since 2 atoms ...
... -Now, Dalton used hydrogen first because it was the lightest element and gave it a mass of 1. -he compared all the other element to this value For ex. : when Dalton looked at water, he saw thta 1 g of hydrogen combined with 8 g oxygen -so he gave oxygen a mass of 8 -this was a mistake since 2 atoms ...
2007 local exam - American Chemical Society
... 19. The standard enthalpy of formation for NH3(g) is –46.1 kJ.mol-1. Calculate ∆H˚ for the reaction: 2NH3(g) r N2(g) + 3H2(g) ...
... 19. The standard enthalpy of formation for NH3(g) is –46.1 kJ.mol-1. Calculate ∆H˚ for the reaction: 2NH3(g) r N2(g) + 3H2(g) ...
Practice sheet #8: thermodynamics.
... (in KJ) that must be added to 1.00 Kg of liquid methanol to raise its temperature from 25°C to its normal boiling point, 65°C, knowing that the molar heat capacity of liquid methanol is 81.6J/°Cmol. Once the methanol has reached its boiling point, it must be vaporized. The molar enthalpy of vaporiza ...
... (in KJ) that must be added to 1.00 Kg of liquid methanol to raise its temperature from 25°C to its normal boiling point, 65°C, knowing that the molar heat capacity of liquid methanol is 81.6J/°Cmol. Once the methanol has reached its boiling point, it must be vaporized. The molar enthalpy of vaporiza ...
Bellin College Homework Supplement
... (iv) Camels store the fat tristearin (C57H110O6) in the hump. As well as being a source of energy, the fat is a source of water, because when it is used the following reaction takes place. What mass of water is available from 1234.0 g of fat? 2 C57H110O6(s) + 163 O2(g) 114 CO2(g) + 110 H2O(l) ...
... (iv) Camels store the fat tristearin (C57H110O6) in the hump. As well as being a source of energy, the fat is a source of water, because when it is used the following reaction takes place. What mass of water is available from 1234.0 g of fat? 2 C57H110O6(s) + 163 O2(g) 114 CO2(g) + 110 H2O(l) ...
Chemical Reactions Notes-1a-1
... Instead, each ion is surrounded by a shell of water molecules. This tends to stabilize the ions in solution and prevent cations and anions from recombining. The positive ions have the surrounding oxygen atoms of water pointing towards the ion, negative ions have the surrounding hydrogen atoms of wat ...
... Instead, each ion is surrounded by a shell of water molecules. This tends to stabilize the ions in solution and prevent cations and anions from recombining. The positive ions have the surrounding oxygen atoms of water pointing towards the ion, negative ions have the surrounding hydrogen atoms of wat ...
Topic 1 Assignment File
... 1) Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirin and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6, with chlorine gas according to the followin ...
... 1) Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirin and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6, with chlorine gas according to the followin ...
Unit 10
... Determine the types of reactants involved and the products formed in the reaction. Write down the correct formulae of reactants on the left hand side of the arrow. Write down the correct formulae of products on the right hand side of the arrow. Balance the equation with simple whole numbers such tha ...
... Determine the types of reactants involved and the products formed in the reaction. Write down the correct formulae of reactants on the left hand side of the arrow. Write down the correct formulae of products on the right hand side of the arrow. Balance the equation with simple whole numbers such tha ...
Electrolysis of water
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.This technique can be used to make hydrogen fuel (hydrogen gas) and breathable oxygen; though currently most industrial methods make hydrogen fuel from natural gas instead.