The Properties of Chemical Reactions

 The Properties of Reactions Essay

Houses of Chemical Reactions

Ms. Whitty, Science 15

Fiona Adams, November initial, 2012

Introduction

Chemical reactions can be a part of our daily lives, via rusting metallic to making loaf of bread to leaves changing color in the land. A chemical reaction is the process that happens when two or more substances combine to produce a chemical alter. When a chemical reaction takes place, the change is definitely indicated by one or more qualitative properties. The colour or scent could change, gas could possibly be produced, a precipitate – a solid element in a answer - could be formed, or perhaps energy could possibly be absorbed or perhaps released. The substances at first involved in a chemical reaction are reactants. When chemical reactions take place, the end result is known as a product. Goods usually have diverse properties than reactants; a genuine between atoms will be improved during the effect, switch the atoms' set up in different substances. A chemical substance is a substance that includes two or more distinct chemically bonded elements. Through this experiment, many different compounds are being caused – potassium iodide, business lead (II) nitrate, acetic acid and sodium bicarbonate. The purpose of this experiment is to determine regardless of whether a reaction happened using qualitative and quantitative analysis.

Procedure

Portion 1 --

Qualitative observations of both potassium iodide and lead (II) nitrate were recorded within a table. Then, the equipment and chemicals necessary were collected – potassium iodide and lead (II) nitrate, a graduated tube, Erlenmeyer flask, small evaluation tube, plastic stopper, and small scale. Using the graduated tube, 10 cubic centimeters of potassium iodide solution was scored and put into the Erlenmeyer flask. Up coming, the lead (II) nitrate solution was poured in the small check tube until it finally was roughly half full. The test pipe was placed inside the Erlenmeyer flask, and sealed with a rubber arreter – the solutions were not mixed. The mass of flask, arreter and articles were based on being located and acessed on a small scale. The mass determined was then documented in another stand. The Erlenmeyer flask was tipped hence the previously separate solutions were allowed to blend, and the new mixture was again considered and noted in the second table. Changes in appearance from your original alternatives were noted in the first table. Lastly, leftover components were disposed of. Part two –

Qualitative observations of the two acetic acid and sodium bicarbonate were recorded in a third table. Products and chemical substances were collected – acetic acid and sodium bicarbonate, a small scale, two plastic " weigh boats”, scoopula, and graduated cylinder. The first weigh motorboat was added to the scale and the scale was " zeroed”. One deal of salt bicarbonate was poured in to the weigh boat with the scoopula, and the outcome was recorded within a fourth stand. Next, the 2nd weigh vessel was positioned on the scale and zeroed. Making use of the graduated cyndrical tube, 15 milliliters of acetic acid was measured and put into the consider boat on the scale. The mass in the acetic acid was recorded in the fourth table. The sodium bicarbonate, measured recently, was poured into the weigh boat of acetic acid, and qualitative findings of that had been recorded in the third table. When the effect was full, the mass of the items shown on the scale was written in the next table. Last but not least, leftover components were discarded.

Outcomes

Qualitative Findings Part 1 –

Before the effect took place, the two potassium iodide and business lead (II) nitrate had comparable characteristics – they were both in a the liquid state, and being obvious and without color. After the effect, the qualitative observations from the new element showed a number of differences. It absolutely was yellow in color, and a coarse precipitate had formed. The substance continued to be in a water state. (Table 2) Quantitative Observations from Part 1 -

Mass of Reactants and Apparatus (g)| 140. dua puluh enam

Mass of goods and...

Sources: University of Washington. Reactions – an intro. http://depts.washington.edu/chemcrs/bulkdisk/chem110A_aut01/notes_Week_5.pdf (accessed Oct. 30, 2012).

Research Daily. Scientific research Reference – Chemical Substance. http://www.sciencedaily.com/articles/c/chemical_compound.htm (accessed Oct. 40, 2012).

American University. Olive oil Production and Environmental Damage. http://www1.american.edu/ted/projects/tedcross/xoilpr15.htm (accessed Oct. 35, 2012).

Chem Professor. Reactants and Goods. http://www.chemprofessor.com/outline7b.htm (accessed Oct. 31, 2012).

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