• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Factors of a reaction lab

Extracts from this document...


Design Question How will altering the concentration of HCl affect the rate of the following reaction: Zn (s) + HCl (aq) ---> ZnCl (aq) + H2 (g) Hypothesis According to the collision theory, the rate of a reaction depends on the frequency of collisions between reacting particles. The more frequent the collisions, the faster the rate of the reaction. However, in order for the collisions to be effective, the particles must collide with sufficient energy (activation energy). Furthermore, the particles must collide with the proper orientation. The aim of this lab is to increase how often collisions occur. Theoretically, we should be able to achieve this by increasing the HCl concentration. However, we will instead decrease the HCl concentration just because it's easier by diluting it with water. We thus predict that by decreasing the HCl concentration, it should take longer for the reaction to produce the predetermined amounts of hydrogen gas that we are observing. Variables Independent- the concentration of HCl Dependent- the rate of the reaction Controlled- Size of test tube Syringe type Timer Mass of Zn Volume of HCl Size of the stopper Controlling ...read more.


294 160 5 366 182 Hydrochloric acid, 0.8 mol dm-3 Time taken for corresponding volume of hydrogen gas to be produced/s Volume of hydrogen gas produced/cm3 Trial 1 Trial 2 1 171 103 2 334 118 3 504 156 4 674 205 5 862 243 Hydrochloric acid, 0.6 mol dm-3 Time taken for corresponding volume of hydrogen gas to be produced/s Volume of hydrogen gas produced/cm3 Trial 1 Trial 2 1 155 249 2 165 253 3 206 278 4 268 351 5 316 449 Observations - Zn clumps together at bottom of test tube - Bubbles are produced - No longer powder - Nothing happens for a while and then all of a sudden there's like this outward burst of energy which results in small intervals btw the given volumes produced Data Processing Overview I will first determine the average time it took for the different HCl concentration to react and produce the given volumes of hydrogen gas. Next I will calculate the standard deviation for each set of trials to determine the accuracy of the average. Finally, I will graph the average times using a scatter. ...read more.


Maybe use a straw or something like that to make sure the Zn gets to the bottom of the test tube. And like blow into the straw (softly!) to ensure that none of the Zn gets stuck to the inside of the straw. We didn't use the same syringe for all the trials because we were trying to get all the trials in on the same day. Use the same syringe for all trials. We didn't get all the trials in on the same day. I think it took us three classes. As a result, each day we were working in different room temperatures. Organize ourselves better so that we get all the trials in on the same day. We couldn't dry the test tube correctly. Each time we dried it there was still water at the bottom of the tube. Maybe like attach a paper towel to a stirrer and swap it around inside the test tube to dry it out. Zn is impure. As a result, the HCl acid could be reacting as well with whatever impurities present are thus slowing down the reaction, perhaps. Obtain pure Zn, if possible. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Chemistry essays

  1. Investigate the rate of reaction of luminol in various factors. The objective was to ...

    Solutions stronger than or equal to 1.5M (i.e. 5% or 18'vol') but weaker than 5.9M are irritants to the eyes and skin. Dangerous with: Organic compounds such as propanone, ethanol, glycerol. Dangerous or explosive reactions can occur. Metals and metal oxides (especially if finely divided) and Tin(II) chloride. Violent decomposition of hydrogen peroxide takes place. Dangerous if swallowed.

  2. flame test lab

    Each element has a different set of emission colors because they have different energy level spacings. We will see the emission spectra or pattern of wavelengths (atomic spectra) emitted by six different elements in this lab. We will then identify an unknown element by comparing the color of the unknown with the flame color of our knowns.

  1. Rates of Reaction Lab

    Also, use the 100 mL measuring cylinders with precision to ensure that the volume of hydrochloric acid used each time is constant for all three concentrations. Data Collection and Processing (DCP) Results Volume of H2 collected every 30 seconds of the reaction Time (mins) (� 0.03) Volume of hydrogen gas(ml)

  2. Airbag design lab. Is it possible to use baking soda, NaHCO3(s), and 2.00 ...

    bag the higher the number of moles of HCl and baking soda will be needed to ensure that the entirety of the bag is filled with Carbon Dioxide. Therefore the volume is capable of changing the variables a result of the experiment.

  1. Acids/Bases Design Lab. How does a change in the pH value of a solution ...

    Only when needed to be massed, and just before the reaction, should the zinc be exposed to the air.

  2. Enthalpy Change Design Lab (6/6)How does changing the initial temperature (19C, 25C, 35C, and ...

    or HCl(aq) is negligible itself - even more so considering the dilute concentration being used in the investigation. Another component of measuring the molar enthalpy change of a neutralization reaction is the change from the initial temperature of the reactants, to the final temperature of the resulting solution.

  1. Chemistry lab reort-molar volume of hydrogen

    volume of hydrogen gas Percentage error 100% 1.34% Conclusion Two results of molar volume of hydrogen have percentage errors of 2% and 3%, respectively. These percentage errors are from the calculation of mole of hydrogen gas. The mole of hydrogen gas equals the mole of magnesium.

  2. Investigating Factors that Affect the Rate of Reaction of the Decomposition of Hydrogen ...

    Once that is done, take a rubber stopper and seal the 10 mL test tube containing the H2O2. Use the test tube holder to hold the test tube into the 1 liter beaker the is being heated to a temperature of about 30°C.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work