θ How does adding salt affect the boiling point of water?

Transcription

1 θ QUESTION: How does adding salt affect the boiling point of water? If HYPOTHESIS: then because. (a scientific reason that supports your prediction) Manipulated Variable: (What will we be changing on purpose?) VARIABLES: Responding Variable: (What will we be measuring?) Controlled Variables: (What things will we be careful to keep the same?) MATERIALS: Think carefully what are ALL of the materials you will need to complete this lab?) PROCEDURE: Write out each step you will need to follow to test your hypothesis. Some reminders: - Does your procedure explain how to set things up? - What data will you collect/measure? - When and what will you record your data? - If I had to follow your procedure to do exactly what you did, would your steps make sense to me? DATA: CONCLUSION: What kind of data will YOU need to collect, as well as our whole class? After we have conducted our experiment, write a conclusion that answers the question and uses evidence from our class data table.

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3 φ QUESTION: How does adding salt affect the boiling point of water? If HYPOTHESIS: then because. (a scientific reason that supports your prediction) Manipulated Variable: (What will we be changing on purpose?) VARIABLES: Responding Variable: (What will we be measuring?) Controlled Variables: (What things will we be careful to keep the same? List at least three.) MATERIALS: 10 g salt 300 ml cold water triple beam balance Think carefully what are ALL of the materials you will need to complete this lab?) PROCEDURE: Write out each step you will need to follow to test your hypothesis. Some reminders: - Does your procedure explain how to set things up? - What data will you collect/measure? - Will you need to measure anything before you start? - When and what will you record your data? - How will you keep track of time? - When will the experiment stop? - If I had to follow your procedure to do exactly what you did, would your steps make sense to me?

4 What kind of data will YOU need to collect? (Hint: We are testing the boiling point of salt water and will need to compare it to the boiling point of pure water...)??????????????? DATA: What kind of data will we need to collect as a whole class????????? CONCLUSION: After we have conducted our experiment, write a conclusion that answers the question and uses evidence from our class data table.

5 λ QUESTION: How does adding salt affect the boiling point of water? If HYPOTHESIS: then because. (a scientific reason that supports your prediction) Manipulated Variable: (What will we be changing on purpose?) A. Salt or pure water B. Temperature C. Amount of salt VARIABLES: Responding Variable: (What will we be measuring?) A. Salt or pure water B. Temperature C. Amount of salt Controlled Variables: (What things will we be careful to keep the same? List at least three.) MATERIALS: 10 g salt 300 ml cold water triple beam balance wire gauze thermometer clamp stirring rod Think carefully what are ALL of the materials you will need to complete this lab?)

6 Write out and fill in each step you will need to follow to test your hypothesis. PROCEDURE: 1. Gather all materials and set up and. 2. Fill the 600 ml beaker with. 3. Measure 10 g salt and add to the water. 4. Stir until the salt and place the beaker. 5. Measure and record. 6. Light the Bunsen burner and. 7. Measure and record every 30 seconds until. 8. Continue heating the salt water and for 2 more minutes after the water starts to boil. 9. and. What kind of data will YOU need to collect? (Hint: We are testing the boiling point of salt water and will need to compare it to the boiling point of pure water...) TIME (minutes) TEMPERATURE (???) OBSERVATIONS DATA: 0 What kind of data will we need to collect as a whole class????????? A: boiled at a higher temperature than. CONCLUSION: D: boiled at. (Which boiled at the highest temperature?) D: boiled at. (Which boiled at the lowest temperature?) M: boiled at a temperature degrees higher than.

7 ψ QUESTION: How does adding salt affect the boiling point of water? If HYPOTHESIS: then because. (a scientific reason that supports your prediction) Manipulated Variable: (What will we be changing on purpose?) A. Salt or pure water B. Temperature VARIABLES: Responding Variable: (What will we be measuring?) A. Salt or pure water B. Temperature Controlled Variables: (What things will we be careful to keep the same? Choose three from this list.) - amount of water - temperature of water - time until boiling - salt added or not - heat of Bunsen burner - amount of salt MATERIALS: 10 g salt 300 ml cold water triple beam balance wire gauze thermometer clamp stirring rod Bunsen burner ring stand thermometer 600 ml beaker striker timer

8 PROCEDURE: Write out and choose the correct word in each step in your procedure: 1. Gather all materials and set up (beaker/ring stand) and (Bunsen burner/triple beam balance). 2. Fill the 600 ml beaker with 300 ml of (water/salt). 3. Measure 10 g salt and add to the water. 4. Stir until the salt (dissolves/disappears) and place the beaker on the (Bunsen burner/ring stand). 5. Measure and record the starting (temperature/volume). 6. Light the Bunsen burner and (record the temperature/ start the timer). 7. Measure and record the (time/temperature) every 30 seconds until (the time is up/water boils). 8. (Continue heating the salt water/turn off the Bunsen burner) and record the temperature for 2 more minutes after the water starts to boil. 9. (Turn off the Bunsen burner/record the temperature) and (clean up/record the temperature). What kind of data will YOU need to collect? TIME (minutes) TEMPERATURE (???) OBSERVATIONS 0 DATA: What kind of data will we need to collect as a whole class? BOILING POINT PURE WATER BOILING POINT SALT WATER A: boiled at a higher temperature than. CONCLUSION: D: boiled at. (Which boiled at the highest temperature?) D: boiled at. (Which boiled at the lowest temperature?) M: boiled at a temperature degrees higher than.