Research Question:
How do different concentrations of nitric acid (measured in molars) with copper powder (grams) affect the rate of reaction (measured in seconds) measured using a stopwatch?
Hypothesis:
The copper powder placed in the most concentrated amount of nitric acid, measured in molar, will take the least amount of time, measured in seconds, to react compared to the amounts of copper powder in other less concentrated amounts of nitric acid. This is as if the concentration of nitric acid is increased, then the amount of time taken for the copper powder to react will decrease, because nitric acid is a highly corrosive chemical and will therefore lead to a rapid and powerful reaction when it comes in contact with the copper powder, thus …show more content…
Limitation Effect of the Limitation on Results Improvements
Not enough trials This leads to not having accurate and reliable results and so being able to answer the research question to the greatest extent, as a lesser number of trials reduces the chances of experimental accuracy Perform more trials for more accurate and reliable results to better answer the research question
Liquid Evaporation This means that the quantity of nitric acid has decreased in some experiments and not in others, resulting in some experiment trials having more liquid than others thus causing changes in rates of reaction, reducing chances of experimental accuracy Maintaining the same conditions for all the tests and trials to prevent liquid evaporation causing faster/slower reaction rates
Time of Reaction Completion Difficulties in measuring the exact time at which reaction has completed due to color change and formation of gas completing at different times, this leads to not having accurate data as time could have been more or less based on times at which factors were considered complete, and so rates would be affected by being faster or slower Considering only one of the two factors of color change or formation of gas to stop the stopwatch and collect the time at, instead of
How do different concentrations of nitric acid (measured in molars) with copper powder (grams) affect the rate of reaction (measured in seconds) measured using a stopwatch?
Hypothesis:
The copper powder placed in the most concentrated amount of nitric acid, measured in molar, will take the least amount of time, measured in seconds, to react compared to the amounts of copper powder in other less concentrated amounts of nitric acid. This is as if the concentration of nitric acid is increased, then the amount of time taken for the copper powder to react will decrease, because nitric acid is a highly corrosive chemical and will therefore lead to a rapid and powerful reaction when it comes in contact with the copper powder, thus …show more content…
Limitation Effect of the Limitation on Results Improvements
Not enough trials This leads to not having accurate and reliable results and so being able to answer the research question to the greatest extent, as a lesser number of trials reduces the chances of experimental accuracy Perform more trials for more accurate and reliable results to better answer the research question
Liquid Evaporation This means that the quantity of nitric acid has decreased in some experiments and not in others, resulting in some experiment trials having more liquid than others thus causing changes in rates of reaction, reducing chances of experimental accuracy Maintaining the same conditions for all the tests and trials to prevent liquid evaporation causing faster/slower reaction rates
Time of Reaction Completion Difficulties in measuring the exact time at which reaction has completed due to color change and formation of gas completing at different times, this leads to not having accurate data as time could have been more or less based on times at which factors were considered complete, and so rates would be affected by being faster or slower Considering only one of the two factors of color change or formation of gas to stop the stopwatch and collect the time at, instead of