• 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 ...

    Dangerous if swallowed. Causes serious internal damage due to release of oxygen. If swallowed: Wash out the mouth and give a glass or two of water. Seek medical attention. If solution gets in eyes: Flood the eye with gently running tap water until a first-aider arrives.

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

    7. The two 150 cm3 beakers labelled 'HCl(aq)' and 'KOH(aq)' containing 40.0 cm3 of 1.00 mol dm-3 HCl(aq) and 1.00 mol dm-3 KOH(aq) respectively, were placed on an electrically powered hotplate which was set to medium-high heat. 8. Two separate temperature probes, connected to Vernier LabQuest LoggerPro data collection units were inserted into the 150 cm3 beakers, meaning

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

    Responding Variable: The responding variable in this experiment is the number of moles of carbon dioxide, water, and sodium chloride solution that forms. Like previously stated if the manipulated variable is of a greater value, the responding variables will be of a greater value.

  2. flame test lab

    Usually each individual excited atom will emit one type of light. Since we have billions and billions of atoms we get billions of excitations and emissions. Different elements emit different emission spectra when they are excited because each type of element has a unique energy shell or energy level system.

  1. Rates of Reaction Lab

    Turn on the magnetic stirrer to the maximum value and simultaneously start a stopwatch. 9. Record the volume of hydrogen gas collected in the gas syringe every 30 seconds until the reaction is complete- end to effervescence and volume stops increasing.

  2. Hydrogen Gas Collection Lab CE (6/6) A sample of solid magnesium ribbon, measuring approximately ...

    a significant amount of the air bubbles trapped in the gas measuring tube, though likely not all, since once the hydrochloric acid fills in the remaining part of the gas measuring tube, some more bubbles will appear. 4. The value recorded for the pressure is that of the atmosphere in

  1. Aim: Using an iodine clock reaction to find the order of hydrogen peroxide and ...

    , cm3/s �31% 10 6 4 0.313 Volumes of Reactants and Rate for Experiment 9 Volume of H2O2 ml, �0.5 Volume of CH3COOH ml, �0.5 Volume of Water ml, �0.5 Rate , cm3/s �31% 10 8 2 0.309 The uncertainty of rate was calculated with the equation 1/3.19 x 100 = 31%.

  2. Design Lab, HCl + Marble chips

    1.50M, 2.00M, 2.50M and 3.00M of HCl 1.50M of HCl= 25.0mL of 3.0M of HCL + 25.0mL of distilled water 2.00M of HCl= 33.0mL of 3.0M of HCl + 16.7mL of distilled water 2.50M of HCl= 41.7mL of 3.0M of HCl + 8.3mL of distilled water And simply use 50mL of 3.0M of HCl Method for Investigation: 1.

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