Name:______Period:_____

RATES OF REACTION

Purpose-To compare reaction rates forincreasing concentration, temperature, and surface area.

Safety - goggles

Procedures: Break each tablet into 4 pieces each to make 12 pieces total.

Effect of Concentration on Reaction Rate

Transfer 20.mLwater into 3 empty test tubes in test tube rack. Simultaneously, add 1 piece of the effervescent tablet to the 1st test tube, 2 pieces to the 2nd and 3 pieces to the 3rd. Record relative rate of reaction using scale of 1-3.

Effect of Temperature on Reaction Rate

Transfer20 mLcold water into test tube 1, 20mL room temperature water into test tube 2, and 20mL hot water into test tube3. Simultaneously, add 1 piece of effervescent tablet to each of the 3 test tubes. Record relative rate of reaction.

Effect of Surface Area on Reaction Rate

Add 20 mL water to each of the 3 test tubes. Simultaneously, add place 1 piece of effervescent tablet in test tube 1,1 piece of the tablet broken into 3-4 smaller piecesin test tube 2, and a crushed piece of tablet in test tube 3. Record relative rate of reaction. Invert test tubes on rack and clean up lab.

Data Table-Observations

Test tube 1 / Test tube 2 / Test tube 3
Concentration
Temperature
Surface area

QUESTIONS-refer to questions

  1. Describe the effect of increased concentration on rate of a reaction.

______

  1. Describe effect of increased surface area (smaller particle size) on rate of reaction.

______

  1. Describe the effect of increased temperature on rate of reaction.

______

  1. Using knowledge gained from this activity, explain why reactions of fireworks are instantaneous and the rusting of a nail is slow.

______

______

RATES OF REACTION

Purpose- To compare reaction rates for increasing concentration, temperature, and surface area.

Safety - goggles

Procedures: Break each tablet into 4 pieces each to make 12 pieces total.

Effect of Concentration on Reaction Rate

Transfer 20.mL water into 3 empty test tubes in test tube rack. Simultaneously, add 1 piece of the effervescent tablet to the 1st test tube, 2 pieces to the 2nd and 3 pieces to the 3rd. Record relative rate of reaction using scale of 1-3.

Effect of Temperature on Reaction Rate

Transfer 20 mL cold water into test tube 1, 20mL room temperature water into test tube 2, and 20mL hot water into test tube 3. Simultaneously, add 1 piece of effervescent tablet to each of the 3 test tubes. Record relative rate of reaction.

Effect of Surface Area on Reaction Rate

Add 20 mL water to each of the 3 test tubes. Simultaneously, add place 1 piece of effervescent tablet in test tube 1, 1 piece of the tablet broken into 3-4 smaller pieces in test tube 2, and a crushed piece of tablet in test tube 3. Record relative rate of reaction. Invert test tubes on rack and clean up lab.

Data Table-Observations

Test tube 1 / Test tube 2 / Test tube 3
Concentration
Temperature
Surface area

QUESTIONS-refer to questions

  1. Describe the effect of increased concentration on rate of a reaction.

______

  1. Describe effect of increased surface area (smaller particle size) on rate of reaction.

______

  1. Describe the effect of increased temperature on rate of reaction.

______

  1. Using knowledge gained from this activity, explain why reactions of fireworks are instantaneous and the rusting of a nail is slow.

______

______