slightly more viscous than water. In dilute solution‚ it appears colorless. Reactions Decomposition Hydrogen peroxide decomposes exothermically into water and oxygen gas spontaneously: 2 H2O2 → 2 H2O + O2 This process is thermodynamically favorable. It has a ΔHo of −98.2 kJ·mol−1 and a ΔS of 70.5 J·mol−1·K−1. The rate of decomposition is dependent on the temperature (cool environment slows down decomposition‚ therefore hydrogen peroxide is often stored in refrigerator) and concentration of the
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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Omar Nunez Period 8 February 7‚ 2013 Mrs. Dube Endothermic vs. Exothermic Reactions Brr! Exclaimed a kid who touched citric acid and baking soda combined. When those two mix‚ it creates a cold endothermic reaction. An exothermic reaction is a reaction that releases energy in the form of an increase in temperature. Endothermic reactions are reactions that absorb energy and cools down surroundings. (Many examples give away exo and endothermic reactions). So listen up! To begin with‚ a chemical
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and scientific and technological enterprises. Content Objectives Students will know that 1. Acetic acid reacts with sodium bicarbonate to produce a gas. 2. Acetic acid and sodium bicarbonate are the chemical names for vinegar and baking soda‚ respectively. 3. The two main purposes of an air bag are to slow a person’s forward movement into the steering wheel (or dashboard) and to provide a cushion between the person and the steering wheel (or dashboard). 4. The three parts of
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the right of the arrow. 10. Write skeleton equations for these reactions. a. “Heating copper (II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide gas” i. CuS + O2 Cu + SO2(g) b. When heated‚ baking soda (sodium hydrogen carbonate) decomposes to form the products sodium carbonate‚ carbon dioxide‚ and water.” i. NaHCO3 Na2CO3 + CO2 + H2O 11. Write and balance equations for the following reactions. a. “Iron metal and chlorine gas
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calculated? Hypothesis If we are attempting to determine the enthalpy change of the thermal decomposition of Sodium Bicarbonate‚ then Hess’s Law will be will be the most effective. Introduction Sodium bicarbonate‚ more commonly known as baking soda‚ has many uses in todays world‚ its main purposes are for cleaning‚ baking‚ and medicine. Some of the most common uses for sodium bicarbonate‚ or baking soda‚ are relieving ulcer pain‚ removing splinters‚ sunburn remedy‚ deodorant‚ enhanced sports performance
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Research The Chemical name for Baking Soda: Baking soda is sodium bicarbonate. The molecular formula of sodium bicarbonate is NaHCO3. What Baking Powder contains: Baking powder is a raising agent that is commonly used in cake-making. It is made from an alkali- bicarbonate of soda‚ and an acid- cream of tartar‚ plus a filler like corn flour or rice flour which absorbs moisture. Baking powder is a mixture of leavening agents (baking soda‚ acid salts) and inert ingredients (cornstarch‚ calcium
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chemical name for baking powder? What is the chemical name for baking soda? What does baking powder contain? What does baking soda contain? How does baking soda work? How does baking powder work? Why is baking powder used in cooking? Why is baking soda used in cooking? What are the advantages and disadvantages of using baking soda? What are the advantages and disadvantages of using baking powder? What are the advantages and disadvantages of using baking soda compared to using baking powder? What
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that causes a chemical reaction with baking soda. This experiment was designed to test 4 kitchen ingredients(Omega oil‚ water‚ lemon juice‚ and vinegar) mixed with baking soda‚ to see which one will cause a balloon to expand. It was hypothesized that baking soda mixed with lemon juice and vinegar would cause the balloon to expand. Using these ideals the experiment was completed and the data was recorded. It was decided that the hypothesis was correct. Baking soda mixed with vinegar and lemon juice
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ABSTRACT Many types of raising agents are used in baking products. Raising agents release carbon dioxide during baking‚ allowing the products to rise. In our experiment‚ we are investigating the effect of different raising agents on the physical appearance of muffins. The raising agents used are baking powder‚ baking soda and yeast. Based on thorough research‚ we hypothesize that baking powder will produce the heaviest muffins while baking soda will produce muffins with the largest circumference
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