Chemical Reactions by LUCY G https://padlet.com/lucygoldsmith2021/pwvcly4wck02 By Lucy Goldsmith, Sophie Picklin, and Ella Caspi en-us 2017-02-23 17:05:38 UTC 2023-03-28 18:58:26 UTC hello@padlet.com Color Change in a Chemical Reaction- By Lucy Goldsmith lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156266543
  • From changing from purple to green: MnO4- + e- → MnO4-2
  • Changing from green to brown/yellow: MnO4-2 + 2H2O + 2e- → MnO2 + 4OH-
    • ]]>     2017-02-26 19:31:45 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156266543     Aroma in Chemical Reactions sophiepicklin2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156776586 The smell of rotten eggs is disgusting,, but it's actually Hydrogen sulfide (H2S) is a gas that sits in the egg  and helps the chick grow. If it sits for too long, it causes bacteria to form, creating a disgusting rotten egg odor. ]]> 2017-02-28 16:26:18 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156776586 Precipitation During a Chemical Reaction ellacaspi2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156778863 Sometimes pipes in a house get clogged because precipitates of magnesium and calcium oxides have deposited themselves within the pipes.]]> 2017-02-28 16:31:56 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156778863 Aroma in Chemical Reactions sophiepicklin2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156784531 The smell of skunk spray is absolutely disgusting! It all has to do with the sulfur in the thiols, which are sulfur compounds that contains a carbon-bonded sulfhydryl or sulfhydryl. It is then released into the air, and produces the gross odor.]]> 2017-02-28 16:47:13 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156784531 Precipitation During a Chemical Reaction ellacaspi2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156787285 This type of reaction occurs when cations and anions in a water containing substance forms an insoluble ionic solid.]]> 2017-02-28 16:55:48 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156787285 Reactants and Products lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156792212
  • MnO4- :  Permanganates are salts of permanganic acid
  • MnO4-2: called Manganate, Permanganate solutions are purple in color
  • 2H2O: water, clear, polar
  • MnO2: This blackish or brown solid occurs naturally as the mineral pyrolusite
  • 4OH- :  It functions as a base. The hydroxide ion forms salts
    • ]]>     2017-02-28 17:09:56 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156792212     What happened? lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156857260
  • Redox reaction is occurring. This basically means that new compounds are formed when one chemical takes electrons from another chemical. So when I say blank reduces blank this is what I mean.
  • In the experiment we add potassium permanganate solution to a sugar and sodium hydroxide solution to reduce it until Mn has a +2 oxidation state. In between are a few transition stages, each with its own colors.  The sugar reduces the manganate with the help of the sodium hydroxide as a catalyst (to help speed up the reaction).  During that reaction the solution changes colors as shown in the video.
    • ]]>     2017-02-28 20:14:19 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156857260     What part of FACTSS lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156857568 This was a color change or the “C” in FACTSS. I know this is a color change because the solution was changed into 4 different colors, which is a sign this was a chemical reaction.]]> 2017-02-28 20:15:38 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156857568 Chemical Equation lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156859269
    ]]>     2017-02-28 20:21:26 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156859269     Color change shown in fireworks- By Lucy Goldsmith lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860034 2017-02-28 20:24:15 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860034 Reactants and Products lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860123 2KNO3: Potassium Nitrate, ionic salt of potassium ions
    K20: Potassium oxide, This pale yellow solid, the simplest oxide of potassium, is a rarely encountered, highly reactive compound
    N2: colourless, odourless, tasteless and mostly diatomic non-metal gas
    O2: odorless, tasteless, poor conductor of heat and electricity

    ]]>     2017-02-28 20:24:39 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860123     What happened? lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860359 Potassium nitrate is used as an oxidizer, decomposes to potassium oxide, nitrogen gas, and oxygen gas.scifun.chem.wisc states, “Oxidizers produce the oxygen gas required to burn the mixture of reducing agents and to excite the atoms of the light-emitting compounds. Various oxidizers are used in both the black powder and the stars. The most commonly used oxidizers are nitrates, chlorates, and perchlorates. The reducing agents, sulfur and carbon, combine with the oxygen from the oxidizers to produce the energy of the explosion.”]]> 2017-02-28 20:25:30 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860359 What part of FACTSS lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860592 Color was the FACTSS indicator in this reaction. I know this because when the reaction happens color is produced. Using combustion, a compound is created and shot into the sky bursting with colors and light.]]> 2017-02-28 20:26:18 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156860592 Temperature change in a chemical reaction- By Lucy Goldsmith lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156861071 2017-02-28 20:27:50 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156861071 Chemical Equation lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863575 2017-02-28 20:37:51 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863575 Reactants and Products lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863736
  • Acetic acid: A clear, colorless organic acid, C2H4O2, with a distinctive pungent odor, used as a solvent and in the manufacture of rubber, plastics, acetate fibers, pharmaceuticals, and photographic chemicals. It is the chief acid of vinegar.
  • Sodium bicarbonate: a white solid that is crystalline but often appears as a fine powder. It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate).
  • Sodium acetate: White deliquescent powder, Vinegar (acetic acid) odor when heated to decomposition
  • Water: Water is a clear polar compound that is at room temperature a tasteless and odorless liquid.
  • Carbon dioxide: Carbon dioxide is a colorless, odorless gas found in our atmosphere. Its chemical formula is CO2, which means it is one carbon atom bonded to two oxygen atoms. It is a waste product in our bodies, and is also produced by burning fossil fuels.

    • ]]>     2017-02-28 20:38:26 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863736     What happened lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863988 The reaction makes carbonic acid which is unstable. It quickly breaks down into CO2 and water. The gas then rapidly leaves the water creating foam and bubbles along the way. The solution also absorbs heat from the surroundings, making the temperature drop.]]> 2017-02-28 20:39:20 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156863988 What part of FACTSS lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156864352 The indicator that was presented in the experiment was a temperature change. After the reactants mixed it created bubbles and fizz (another indicator), but also a temperature decrease (the indicator I’m focusing on). As I said before heat was absorbed from its surroundings, which is an endothermic reaction. That means exactly what I said before, heat was absorbed and the temperature dropped. ]]> 2017-02-28 20:40:55 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156864352 Temperature change in a chemical reaction- By Lucy Goldsmith lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156864526 2017-02-28 20:41:41 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156864526 Chemical Equation lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865020 C2H3NaO2 + H2O → Na(OH) + HC2H3O2]]> 2017-02-28 20:43:52 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865020 Reactants and Products lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865245 H2O: water, polar, clear
    C2H3NaO2:  is the sodium salt of acetic acid. This colorless deliquescent salt has a wide range of uses.
    Na(OH): Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound. It is a white solid and highly caustic metallic base
     HC2H3O2: a colourless liquid organic compound
    ]]>     2017-02-28 20:44:52 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865245     What happened? lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865441 Sodium acetate trihydrate crystals are added to water and heated up so they melt. After it is melted, a crystal of sodium acetate trihydrate was added to  the solution. During the reaction sodium separates from the acetate and bonds with hydroxide. After the crystal is added the whole solution turns into a solid that becomes hotter- an exothermic reaction.]]> 2017-02-28 20:45:47 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865441 What part of FACTSS lucygoldsmith2021 https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865601 A temperature change happened and that is the T in FACTSS. Heat was used to melt the crystals, but once they were melted and cool, another crystal was added making the solution hotter. They compare this to hand warmers because to ignite the heat you have to break something inside the pack, just like how to crystal ignited the solution making it hot. ]]> 2017-02-28 20:46:33 UTC https://padlet.com/lucygoldsmith2021/pwvcly4wck02/wish/156865601