Chemistry Project

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by quinton hsieh5 views·Updated Jun 7, 2022
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  1. Hi everyone.
  2. I'm going to talk about chapter 8.1
  3. chemical reaction and equation today.
  4. And I'm going to show you how to write the balanced chemical equation step by step.
  5. Mhm.
  6. First of all,
  7. what is a chemical reaction?
  8. Chemical reaction is the process that atoms are arranged to form a new substance.
  9. You might wonder
  10. how do I know there is a chemical reaction going on.
  11. Here are some physical evidence of a chemical reaction
  12. including temperature change. Release of energy in the form of light
  13. color change alter. Which is smell
  14. gas bubble and formation of solid
  15. which is the precipitate
  16. in the term
  17. temperature change in chemical reaction
  18. when N. G. Is released in extra thermic reaction
  19. which has heat given off
  20. the temperature of the reaction mixture increased
  21. and it
  22. release the light into its surroundings.
  23. The picture here shows that the fire is burning the wood
  24. and
  25. it rises up the temperature.
  26. Chemical reactions can also give off energy in the form of life
  27. when the electron released the energy,
  28. it's in the form of light of a particular color.
  29. The picture shows that the light bulb is powered by the electron which make it glow.
  30. Chemical reaction can also detected by color changes.
  31. The product we get from chemical
  32. reaction might have different molecular structure from the original substance
  33. which produced a color change.
  34. For example, this picture shows that the enzymatic browning of apples
  35. happened when the enzyme
  36. Holy fennel
  37. oxidation
  38. and apple reacts with oxygen
  39. to form the brown color.
  40. Okay,
  41. there might also be older
  42. produce from the
  43. chemical reaction.
  44. When two or more compounds are mixed
  45. and order is
  46. present,
  47. A chemical reaction has taken place.
  48. The this picture shows that during the process of rotting
  49. chemical reaction take place and a composition changed to cause bad spell.
  50. Okay.
  51. That's pretty cool.
  52. The formation of gas bubble
  53. when two liquids are makes usually indicate that a gas has fallen.
  54. A gas can also be formed when um
  55. solid is added to a
  56. solution.
  57. The picture shows that if you mix baking soda with lemon juice on vinegar,
  58. both substance quickly react to foreign bubble,
  59. which the bubble is made from carbon dioxide.
  60. The formation of solid.
  61. Our sympathy
  62. or a cured when
  63. so solution contains ionic compounds are mixed to form
  64. and sellable product.
  65. This picture shows the reaction of silver nitrate and sodium chloride
  66. and water which produced acquis sodium nitrate and solid silver chloride
  67. Chemical equation.
  68. Chemical equation are written expression to represent chemical reactions
  69. equations shows reacting which are the starting substance on the left side
  70. and products which are the systems formed during the reaction on the right side.
  71. The error is used to show the direction of which way the reaction program
  72. and to separate the reaction from the product.
  73. Chemical equation symbol.
  74. Oh that's messed up
  75. when the reaction is reversible.
  76. A two Way
  77. Mirror is Houston.
  78. Also
  79. symbols such as S which represents solid.
  80. Ele represent liquid G. Represent gas and A Q. Represents acquiesce
  81. are used to show the physical state
  82. of the reactor
  83. and product.
  84. Alright equation
  85. What equations are statement too,
  86. indicate reactant and product of chemical reactions.
  87. The equation here described the reactions between aluminum and bromine.
  88. Aluminum is a solid and drama is a different.
  89. The brownish red solid is the product of aluminum
  90. Roma and settles on the bottom of the two
  91. skeleton equation.
  92. A skeleton equations uses chemical from your last to show the reactor and products.
  93. For example,
  94. the skeleton equation for the reactor between
  95. aluminum and bromine uses the formula A. L. For
  96. aluminum, V. R. Two for bromine and A lbr three for aluminum bromide.
  97. In place of words,
  98. balanced chemical equation.
  99. First,
  100. why do we have to balance the equation?
  101. We have to balance it because of the law of conservation of mass.
  102. This law states that matter is neither created nor destroyed.
  103. Therefore,
  104. it is important that chemical reactions are balanced
  105. to show that the atoms are conserved,
  106. balanced chemical equation shows equal number of atoms
  107. of each reaction, and each project on both sides
  108. of the reaction error.
  109. To balance an equation, you have to find the correct coefficient for the
  110. chemical formulas in the skeleton equation,
  111. which is the number written in front of the reactant or product
  112. in this example,
  113. the number
  114. 23
  115. and who are the coefficients?
  116. It shows that there are two
  117. Aluminum atoms on the reaction side and two aluminum atoms on the products.
  118. Same for grandma.
  119. There are three atoms of roman on the reactor inside and three atoms of
  120. the
  121. on the product side,
  122. mm hmm.
  123. First of all
  124. right, the skeleton equation for the reaction
  125. solid magnesium and oxygen gas react to foreign solid magnesium oxide.
  126. There are two atoms of
  127. oxygen on the left side, see the two in red.
  128. To put the coefficient to in front of magnesium oxide on the right side,
  129. to balance the oxygen atom on both sides,
  130. the coefficient to on the right side
  131. indicated to magnesium oxide.
  132. So we need to put two in front of magnesium on the left side to balance the magnesium
  133. atoms.
  134. In conclusion, chemical reactions occur occur everywhere in the world around you,
  135. not just in the chemical lab,
  136. for example, photosynthesis, resting, baking,
  137. digestion, chemical batteries
  138. and washing with soap and water.
  139. A chemical reaction is fairly useful written
  140. description of what happened in the chemical reaction
  141. and what is
  142. the in the end?
  143. Thank you.