Determining The Properties Of Acids And Bases Lab Report
Determining the Properties of Different Acids and Bases
Yamin Liu
November 16th, 2017
Chemistry 1021
Section: 427
Benton Smith
Discussion of Results
The goals of this experiment were to find the identities of four unknown compounds and to first determine the pH. We then were required to run a series of anion and cation tests to determine the composition of the unknown solutions. To get more knowledge about these solutions we ran a series of dilutions to see if anything changed. Finally we tested the pH of household items and ran titration experiments with them to have a better look at environmental impact for safe disposal.
When we received the four different samples they were labeled as A6, B6, C6 and …show more content…
We used 70% and 91% isopropyl alcohol, pinesol and Windex as our chemicals and recorded their pH using a pH probe as shown in Table 4. Both isopropyl alcohols were very close to being neutral while the Windex was very basic and the pinesol was very acidic. The titrations showed the concentrations and these can be seen in Table 5, they were all very low but the 70% isopropyl was extremely low showing this is great for environmental impact disposal and it being an organic …show more content…
This happens because the strip is stained with litmus, which changes color to indicate the acidity or alkalinity of a solution. In chemistry acids are known to be proton donors while bases are proton acceptors1. Unknown B had a pH of 13.77, which is a very high base, and this is because the cation potassium is an alkali metal having very low ionization enthalpy. Unknown A was identified as HCl, which had an initial pH of 0.56, and this is a well-known strong acid. HCl ionizes completely in water unlike other weak acids that partially ionize3. During the tests for the anions present in the unknown solutions we learned a lot about our solutions. For the first test, chloride anion, we received positive results from A and C. This is because they had chloride anions present and when mixed with AgNO3 and HNO3 the chloride ion solutions are used because silver nitrate is insoluble in HNO3. During the acetate anion test we had a positive result for solution D that proved the presence of the acetate ion. This reaction was from one drop of concentrated sulfuric acid and 1ml of ethanol and then required heating to excite the solution. Since ethyl acetate was produced we knew D contained the acetate anion, the fruity aroma produced after the solution was heated to release a gas proved this. This newly made
Yamin Liu
November 16th, 2017
Chemistry 1021
Section: 427
Benton Smith
Discussion of Results
The goals of this experiment were to find the identities of four unknown compounds and to first determine the pH. We then were required to run a series of anion and cation tests to determine the composition of the unknown solutions. To get more knowledge about these solutions we ran a series of dilutions to see if anything changed. Finally we tested the pH of household items and ran titration experiments with them to have a better look at environmental impact for safe disposal.
When we received the four different samples they were labeled as A6, B6, C6 and …show more content…
We used 70% and 91% isopropyl alcohol, pinesol and Windex as our chemicals and recorded their pH using a pH probe as shown in Table 4. Both isopropyl alcohols were very close to being neutral while the Windex was very basic and the pinesol was very acidic. The titrations showed the concentrations and these can be seen in Table 5, they were all very low but the 70% isopropyl was extremely low showing this is great for environmental impact disposal and it being an organic …show more content…
This happens because the strip is stained with litmus, which changes color to indicate the acidity or alkalinity of a solution. In chemistry acids are known to be proton donors while bases are proton acceptors1. Unknown B had a pH of 13.77, which is a very high base, and this is because the cation potassium is an alkali metal having very low ionization enthalpy. Unknown A was identified as HCl, which had an initial pH of 0.56, and this is a well-known strong acid. HCl ionizes completely in water unlike other weak acids that partially ionize3. During the tests for the anions present in the unknown solutions we learned a lot about our solutions. For the first test, chloride anion, we received positive results from A and C. This is because they had chloride anions present and when mixed with AgNO3 and HNO3 the chloride ion solutions are used because silver nitrate is insoluble in HNO3. During the acetate anion test we had a positive result for solution D that proved the presence of the acetate ion. This reaction was from one drop of concentrated sulfuric acid and 1ml of ethanol and then required heating to excite the solution. Since ethyl acetate was produced we knew D contained the acetate anion, the fruity aroma produced after the solution was heated to release a gas proved this. This newly made