14/10/19 by Isac Ruben https://padlet.com/isacruben/tbhfxspgjyyj Grade 11 A en-us 2019-10-14 03:49:13 UTC 2025-12-27 22:05:45 UTC hello@padlet.com Sherin https://padlet.com/isacruben/tbhfxspgjyyj/wish/397255617
learning objective: Investigate a factor that affects the rate of the reaction.

Independent variable:  , nature of the reactants
Dependent variable:
Time taken for the reaction
Controlled  variable:
Concentration of the reactants, temperature, concentration of HCl
Aim:
Procedure:
1. Take the same concentration of the metals provided in three different test tubes. 
2. Add the same amount (1.5 mole) of HCl in each test tube and observe the reaction. 
3. Note the time taken for the particular reaction. and compare the results. 

   observations:
1. Aluminium: did not react, no change after 5 minutes
2. Zinc: reacted under 1 minute
3. magnesium: reacted immediately

Conclusion: Magnesium is the most reactive metal out of the three given metals.





]]> 2019-10-14 03:59:40 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397255617 ZANE https://padlet.com/isacruben/tbhfxspgjyyj/wish/397255846 L.O. : INVESTIGATE THE FACTOR THAT AFFECTS THE RATE OF A REACTION.

Independent variable:  concentration CHANGE FOR (MAGNESIUM)
Dependent variable:
RATE OF CHANGE OF REACTION
Controlled variables:
 SURFACE AREA FOR (ZINC)


AIM: To see the change in concentration for Magnesium

conclusion: On adding 1.5 moles of Hcl to magnesium  there was a small effervescence ]]> 2019-10-14 04:00:58 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397255846 VARUN https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256132 Learning Objective: Investigate a factor which alters the rate of reaction.

Independent variable: Concentration of HCl with Zinc.

Dependent variable:
Time taken for reaction.

Controlled Variable:
Surface Area of substance, Temperature of system, nature of reactants.

Hypothesis:
As the concentrations of HCl increases, the rate of reaction should increase.

Procedure:
  • Prepare 3 different concentrations of HCl.
  • Take the same amount of Metal or Salt in the test tubes.
  • After preparing different concentrations of HCl, add 2 or 3 drops of it to each test tube containing the magnesium.
  • As the white crystals of ZnCl2 are formed we can mark the end of the reaction.
]]> 2019-10-14 04:02:37 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256132 Anish https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256655 LEARNING OBJECTIVE: INVESTIGATE A FACTOR THAT AFFECTS THE RATE OF A REACTION

INDEPENDENT VARIABLE - concentration of HCl

DEPENDENT VARIABLE - time taken for the reaction

CONTROLLED VARIABLE  - surface area of zinc

PROCEDURE: take an amount of a metal into a test tube  and add a mole(say 1 mole) of HCl into it.
now we have to measure the time taken to complete the reaction and note it.
we have to repeat the step 1 and step 2 for the two metals and compare the time taken for these reactions of metals.
PREDICTION: zinc would have the fastest reaction among the other metals
OBSERVATION: zinc reacts very slowly with HCl the time taken is approximately 8 seconds.Whereas aluminium has no change.Magnesium in another state had a rapid response to HCl and it took about 3 minutes to complete the reaction
CONCLUSION: aluminium had no change with HCl and zinc reacted slower compared to magnesium and magnesium was the fastest reaction and my prediction was hence not true. zinc is the slowest reaction.]]> 2019-10-14 04:06:28 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256655 QUESTION https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256933 Q: DESIGN AN EXPERIMENT TO INVESTIGATE RATE OF CHANGE OF A REACTION.

]]> 2019-10-14 04:08:31 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256933 Sadira https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256937 L.O.- Investigate a factor that affects the rate of reaction.

Independent variable- Nature of metals (Zinc,Aluminium and Magnesium).
Dependent variable- Time taken for reaction.
Controlled variable- Surface area of substances, Concentration, Temperature.

Hypothesis- Aluminium will react the fastest and Zinc the least.

Procedure-
  1. Take an amount of one metal into a test tube and add one mole of HCl to it.
  2. Measure the time taken to complete the reaction and note it down.
  3. Repeat step 1 and 2 for the other two metals and compare the time taken.
Observation-
Aluminium had no change
Zinc started to react after 10 seconds and took about 5 minutes to complete.
Magnesium started to react immediately and finished in about 3 minutes.
Conclusion-
Magnesium reacted the fastest, while zinc reacted slower than magnesium but faster than aluminium and aluminium had no change.
Therefore my hypothesis was wrong.
]]> 2019-10-14 04:08:33 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397256937 saiesha https://padlet.com/isacruben/tbhfxspgjyyj/wish/397261199 LO- INVESTIGATE THE FACTOR THAT AFFECTS THE RATE OF A REACTION.
 independent variable- concentration of reactants HCl 
dependent variable-
time taken
controlled variable-
surface area, temperature of system.
hypothesis- the mass of the apparatus should increase with time as the concentration of CO2.
procedure:
1. add a particular amount of calcium carbonate in a conical flask.
2.add a concentration of hydrochloric acid
3. plug the top of the flask with cotton
4. after a few seconds the cotton would be saturated with carbon dioxide. we can measure the mass of the whole reaction mixture after every 5 seconds.
57.43- 2M
59.72-1.5M

]]> 2019-10-14 04:36:49 UTC https://padlet.com/isacruben/tbhfxspgjyyj/wish/397261199