Nicole+&+Maurits

//**maurits and nicole wiki __Lab Comparing Reactivity of 5 Metals__ **//
//__

AIM __// Our aim is to find out which metal out of iron, copper, zinc, aluminum and magnesium which is more reactive.  //__HYPOTHESIS__// If a metal is reacted to hydrochloric acid and we measure the time for it to start bubbling, then the metal magnesium will be most reactive and it reacts because there are electrons and the sharing of the electrons and ionic bonds are being formed and I think that the magnesium is most reactive.

__ //OUR VARIABLES TABLE//  __
 * Independent Variable || The different metals || We will use iron, copper, magnesium, zinc and aluminum. ||
 * Dependent Variable || The time it takes for the metals to start reacting, || We will measure this using a stop watch. ||
 * Constant Variables || * The Acid
 * The amount of acid
 * The amount of metals || * We will only use hydrochlorid acid
 * We will use 10 ml of acid per test tube.
 * We will put an even quantity of metal into each test tube ||

Equipment used in our experiment
 * 1) 5 beakers - to put metals in
 * 2) Hydrochloric acid - we put 10 ml in each beaker
 * 3) A sample of magnesium
 * 4) A Sample of aluminum
 * 5) A sample of zinc
 * 6) A sample of copper
 * 7)  A sample of iron
 * 8) Flip camera
 * 9) A rack for beakers
 * 10) stop watch
 * 11) Spatula

//__METHOD__//  Step 1. Fill a beaker with 10ml of hydrochloric acid. Step 2. Get a sample of the metal we are using first. Step 3. Place the metal in the beaker Step 4. Get stopwatch ready Step 5. Make sure we record with a flip camera Step 6. Watch and record what is happening Step 7. Record the results Step 8. Repeat experiment with the rest of the metals. Step 9. Compare times Step 10. See which one has the lowest time is the most reactive and the one with the highest time is the least reactive

// __ Results __  // Nothing happened It didn’t dissolve The colour is the same || It started bubbling No smell Became foggy so can’t see The colour still the same The size and the shape still the same || The bubbling is not really increases in 1min 2 minutes slowly increases bubbling 2 min Colour still the same The size and shape is still the same || A few bubbles on the copper sample No odour No change in colour The size and shape still the same || A big reaction There is steam coming out The sample of magnesium is moving around Lots of bubbles around There is like white foam at the top There is condensation in the test tube No smell It is shrinking It has disappeared || //__
 * Metal || Time || Observations ||
 * Aluminum || 2:00 – No reaction || No smell
 * Zinc || 10 seconds - reacted || It reacted
 * Iron || 2 minutes - Little reaction || Bubbling slightly after 5 seconds
 * Copper || 2 minutes – nothing happened || No reaction just a
 * Magnesium || Straight away - Reaction || The second we put it in it started reating

THE RANK ORDER OF THE METALS (most reactive to least reactive) __// 1. Magnesium 2. Zinc 3. Iron 4. Copper 5. Aluminum

<span style="color: black; font-family: 'Calibri','sans-serif'; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: Arial; mso-bidi-font-style: italic; mso-hansi-theme-font: minor-latin;">__ CONCLUSION __ Our hypothesis was correct, we put metals in hydrochloric acid and we measured the time for it to fully react (if it did react), and before we began we thought magnesium would be the most reactive and it was the most reactive. We have now relised that not all of them reacted and that some of them reacted really slow and some really fast. the we were finding out the reactivity of the metals and now we know that nagnesium os the most reactive and the least aluminium.

//__<span style="color: #243f60; font-family: 'Calibri','sans-serif'; font-size: 16pt; line-height: 115%; mso-bidi-font-family: Arial;">Evaluation __//<span style="font-family: 'Arial','sans-serif'; font-size: 11.5pt; line-height: 115%;"> <span style="color: black; mso-ascii-font-family: Calibri; mso-bidi-font-family: Arial; mso-hansi-font-family: Calibri;">Evaluation: the data is reliable because as we do the experiments more often, the elements’ properties will not change, and so they will not change their reactivity and the ranking will stay the same except if something goes wrong. The method is not very valid for collecting data, because the exact quantity of the metal samples is not listed and so there could be confusion which could affect the results. One could place more or less of one sample in the test tube and so affect the results. Another weakness in the method was that our seventh step in the method did not work out because we cannot remove the sample from the test tube after it has had a reaction first of all because it would be dangerous, and because the sample couldn’t be reused anyways so it wouldn’t really matter. || Improvement || || Weigh the different samples and figure out the same mass for the samples || || Removed that specific step. || <span style="color: black; mso-ascii-font-family: Calibri; mso-bidi-font-family: Arial; mso-hansi-font-family: Calibri;">This experiment was a fair test because we did not change more than one factor at a time; we did not change any of the controlled variables although it was difficult to distribute the different quantities of metals evenly. <span style="font-family: 'Arial','sans-serif'; font-size: 11.5pt; line-height: 115%;"> Processing Data:
 * Weaknesses
 * Exact quantity of samples were not listed
 * Step seven did not work