In this experiment, osmosis was observed. Osmosis is the movement of water particles from a dilute solution to a more concentrated solution across a semi-permeable membrane. When the egg shell was removed, the membrane left behind was The albumen was more dilute than the corn syrup, so water moved from the albumen across the semi-permeable membrane and into the syrup. This caused the egg to reduce in size and wrinkle. The albumen was more concentrated than the fresh water however, so water particles moved across the semi-permeable membrane into the egg, making it swell. ANSWERS TO QUESTIONS: Would the same observations be made with an egg with the shell intact? No, because the egg shell is not semi-permeable. If the experiment is carried out using the same method but replacing the corn syrup with salt water what observations would be made? The same observations be made once the concentration of the salt solution was higher than that of the albumen. APPENDIX C RUBRIC This is the Mark Scheme which will be used to score your Lab Reports PERFORMANCE RATING Excellent Average Fair Poor SECTION COMPETENCY 4 3 2 1 The aim is The aim is The aim is not Effective The aim is Aim clearly slightly stated. Communication quite vague. stated. unclear. Apparatus Apparatus Apparatus list Apparatus list list is list is is incomplete. is incomplete. complete. complete. Student gives Student gives Student gives Apparatus Knowledge Student the correct the correct the correct gives the name of most name of only name of most correct the equipment a few pieces equipment name of all they listed. of the used.
In this experiment, osmosis was observed. Osmosis is the movement of water particles from a dilute solution to a more concentrated solution across a semi-permeable membrane. When the egg shell was removed, the membrane left behind was The albumen was more dilute than the corn syrup, so water moved from the albumen across the semi-permeable membrane and into the syrup. This caused the egg to reduce in size and wrinkle. The albumen was more concentrated than the fresh water however, so water particles moved across the semi-permeable membrane into the egg, making it swell. ANSWERS TO QUESTIONS: Would the same observations be made with an egg with the shell intact? No, because the egg shell is not semi-permeable. If the experiment is carried out using the same method but replacing the corn syrup with salt water what observations would be made? The same observations be made once the concentration of the salt solution was higher than that of the albumen. APPENDIX C RUBRIC This is the Mark Scheme which will be used to score your Lab Reports SECTION COMPETENCY PERFORMANCE RATING Excellent 4 Average 3 Fair 2 Poor 1 Aim Effective Communication The aim is clearly stated. The aim is slightly unclear. The aim is quite vague. The aim is not stated. Apparatus Knowledge Apparatus list is complete. Student gives the correct name of all Apparatus list is complete. Student gives the correct name of most equipment used. Apparatus list is incomplete. Student gives the correct name of most the equipment they listed. Apparatus list is incomplete. Student gives the correct name of only a few pieces of the
chem_092_lab_manual_2012-2013.docx