The Collision Theory and the Rate of Chemical Reaction What is ItACTIVITY 1: FACTORS AFFECTING THE RATE OF CHEMICAL REACTIONMaterials: Baking soda, 2 pcs bowls, 2 clear cup/glass, 2 Egg shells (washed and dried),spoon, vinegar, mortar & pestle, 2 glasses of Water (1 hot and 1 relatively cold),2medicine tablet and timerProcedure: Reminder: Prepare all materials and read the instruction completely beforeperforming the activity. Some substances can have an irritating odor, avoid inhalingdirectly. Use of mask is advised.A. Effect of Concentration on the Rate of Chemical Reaction1. Using a spoon, measure an equal amount of baking soda. Place it in each bowl.(inthe absence of baking soda, crushed egg shell can be used)2. Prepare two clear cups or glasses. Fill about half of the cup with pure orconcentrated vinegar.3. Fill the other cup with equal amount of diluted vinegar. Prepare this by mixingthree parts water and one part vinegar (you may use measuring cup or spoon)4. At the same time, pour the vinegar to each of the bowls with baking soda. Observe.Write your observations below.Table A: Observing the Effect of Concentration on the Rate of ReactionObservationBaking soda + ConcentratedvinegarBaking soda + Diluted VinegarB. Effect of Temperature on the Rate of Chemical Reaction1. Drop one medicine tablet in a glass of hot water, the other tablet in a glass withrelatively cold water. Observe. Write down your observation on the table below.2. Record the time it takes for the tablet to start showing disintegration (breakdown)as well as the time for its complete dissolution.Table B: Observation on the Dissolution of Medicine TabletObservationTablet in Hot WaterTablet in ColdWaterObservation at Time 0 s (as soon as it isdropped)Time of start of disintegration(aec}Time of complete dissolution (sec)C. Effects of Particle Size on the Rate of Chemical Reaction1. Get a clean egg ahell. Crumble the half of the egg shell with just your hand.2. Use the other half of the egg shell and pulverize using mortar and pestle (ifunavailable, put the egg shell in a paper or plastic and use hammer or rock topulverize)3. With a spoon, measure equal amount of crushed and pulverized egg shell.4. Put equal amounts of vinegar to a clear glass/cup. Place the egg shell (pulverizedand crushed) separately on each glass. Observe. Record your observation on thetable belowTable C: Observing the effect of size on the rate of reactionObservationCrushed Egg shellPulverized Egg shellGuided Questions: Write your answer in your notebook.1. What were the observable signs which signifies that a reaction has takenplace? Guided Questions: Write your answer in your notebook.1. What were the observable signs which signifies that a reaction has takenplace?23DO Q1_PhysicalScienceSHS_Module1In which of the two, did the signs of chemical reaction first appear, hence faster?A. Baking soda with concentrated vinegar or diluted vinegar?B. Tablet in hot water or in cold water?C. Crushed egg shell or pulverized egg shell?3. What is the effect of using a higher concentration to the time of chemical reaction?4. What is the relationship of temperature to the rate of chemical reaction?5. What is the effect of the size of particles to the chemical reaction?2.

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1. What were the observable signs which signifies that a reaction has taken place?