In this experiment. I will be proving the corrosion rate of Cu wire after go forthing them in different liquids with different pH degrees. By making so I will be able to find which pH degree corrodes copper the fastest. I will carry on this experiment by pouring 250mL of different liquids with different pH degrees in cups. followed by an Fe strip placed into the cup. A stop watch will be clocking how long it takes the Fe strip to to the full eat. The cups will be placed in the same environment right following to each other in order for the cups to be in the same temperature. All of the cups will be the same type of cup to do certain the cups won’t have a function finding the consequences.
There will be three tests for each type of liquid. This will guarantee the most accurate consequences. The pH degree will be tested with a strip of litmus paper to find the official pH degree of the liquid. The stop watch will get down every bit shortly as all of the Cu wire are placed into the cups. I will be watching the cups. taking note of any qualitative informations I see. When I see that the Fe strip in one of the cups is to the full covered in rust. I will enter the clip that was on my stop watch. To analyse the information I will foremost happen the mean pH degree for each of the liquids. Then I will average the entire clip it took for the Cu wire to eat. This information will be in hours. To see if there was any correlativity between the independent variable and dependent variable. I will make a graph with the clip it took the Cu wire to eat as the y-axis and the pH degree as the x-axis.
Hypothesis: If the pH degree is more acidic. than the Fe strip will eat at a faster rate. Independent Variable:
pH degree of liquids
Dependent Variable: rate of corrosion of Fe strip
Control: pH of 7 ( Tap H2O )
• Same sum of liquid in each cup ( 50mL )
• Same sized Cu wire ( 5?x3/4?x3/64? )
• Same type of cup
• Cups placed in same temperature
• Cups placed in same environment
• 12 Cu wire
• 4 see through cups
• 150mL of acetum
• 150mL of bleach
• 150mL of pat H2O
• 150mL of H peroxide
• Litmus paper
• Stop ticker
• Paper towel
1. On the see through cups. label which liquid will be poured into them 2. Pour 50mL of the liquids into their corresponding cups. 3. Put litmus paper into each liquid to acquire official pH degree. Record pH degree. 4. Topographic point Fe strip into liquid. doing certain it is wholly surrounded by liquid 5. Start stop watch every bit shortly as the Cu wire are placed into cup. 6. Detect the Cu wire. Record down the clip whenever one of the Cu wire is to the full covered in corrosion. 7. Once all the times are recorded empty the cups and rinse them out with H2O. 8. Repeat stairss 2-7 two more times.
9. Find the mean clip it took to eat the Fe strip.
I will be proving how pH degrees of liquids affect the corrosion rate of an Fe strip. The independent variable for this experiment is the pH degree of the liquid. I will be utilizing four different liquids. each holding a different pH degree. I will be utilizing tap H2O. which is impersonal ; salt H2O. which is by and large somewhat basic ; bleach. a really basic liquid ; and acetum. a really acidic liquid. The tap H2O will function as my control. Having a assortment of pH degrees helps to give me a better position on how much of a factor pH degree is on corrosion rate. The dependent variable will be the clip it takes the Fe strip to to the full eat. The unit for this measuring will be proceedingss.