kite runner

Topics: Chemistry, Lead(II) nitrate, Chemical element Pages: 1 (308 words) Published: October 31, 2014

Lit Review #2
In this article, April Altott questioned herself about what will happened after mix lead nitrate with potassium iodide together, and what type of reaction will occur between them. She explained the materials, directions, explanation, safety precautions, and waste disposal for this experiment. During the experiment, lead nitrate and lead iodide are solid, so she let both substances dissolved in water and resolute shows both have the clear color. Is usually necessary mix to let the molecule and ions move, and they can collide and have a chemical reaction. After this step, she put them together, the color immediately become a pure yellow, but just for a few seconds, then they slowly mix with each other, and the color become clear again. She adds hot water into the resolute and let it cool down, the solution shows the golden flake called lead iodide. The equation for the experiment is Pb(NO3)2(aq) + 2KI(aq) ----> PbI2(s) + 2KNO3(aq), the place of the element is switch. In this chemical reaction experiment, the double replacement reaction occurs in here. There are many information I find in the article and resources I know already to conclude this experiment. After what she explained to me, it tells perfectly what happened to lead nitrate and potassium iodide during the specific condition. Potassium and nitrate, they can dissolve together, so they are clear. Lead and iodide can’t be dissolved in water, and they become the golden flakes. The equation for the chemical reaction matches the form of double replacement reaction too. So it can prove this article’s information is enough to give the conclusion. The importance of this experiment is to figure out what type of reaction it has, and I think is really important to know the type of reaction. April Altott’s experiment successful proved the double replacement reaction.
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