Lab+-+Salt+&+Boiling+Point

Name: Date: Block: Salt’s Effect on Water’s Boiling Point Premise: When cooking pasta, chefs always add a bit of salt. Its not enough to change the taste of the pasta, so why are chef’s adding the salt? Hypothesis: __________________________________________________________________________________________________________________ Procedure: Data: Continue data Below if necessary
 * 1) Gather materials: Hot Plate, Thermometer, Beaker, salt, water, scale, petri dish
 * 2) Fill beaker with 100ml of water.
 * 3) Measure and record starting temperature.
 * 4) Measure and record temperature every minute
 * 5) Heat liquid until it reaches its boiling point (same temp 3 minutes in a row)
 * 6) Refill beaker with fresh water (100 ml.)
 * 7) Measure out 1 gram of salt and add to water.
 * 8) Repeat procedure above to find new boiling point.
 * Time (minutes) || 0 || 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || 9 || 10 || 11 || 12 || 13 || 14 ||
 * Water ||  ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||
 * Water with salt ||  ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||   ||

Water only ||  ||   ||   ||   ||   ||   || 14 min || Water with salt ||  ||   ||   ||   || XXX || XXX || 11 min ||
 * || Group 1 || Group 2 || Group 3 || Group 4 || Group 5 || Group 6 || Average ||
 * Water’s Boiling Point ||  ||   ||   ||   ||   ||   || 100C ||
 * Time to Reach Boiling
 * Water’s Boiling Point with Salt ||  ||   ||   ||   || XXX || XXX || 104C ||
 * Time to Reach Boiling

Data Analysis:
 * 1) Calculate the average boiling point for water alone by collecting data from all groups. Record data in table and here


 * 1) Calculate the average boiling point for water with salt by collecting data from all groups. Record data in table and here

Conclusion: __`__
 * 1) Did the boiling point of water change when salt was added? How?
 * 2) Did the length of time needed to reach the boiling point change? How?
 * 3) How well did your boiling point data match the averages that you calculated from the other groups? Use data to support your claim.
 * 4) Did you notice any outliers (data that really didn’t match the work of others)? Provide at least two observations which might explain the presence or absence of outliers between the groups.
 * 1) Based on your data, explain why chefs add salt to the water when cooking pasta. Be sure to use data collected above to support your claims. Use the modified 12-sentence protocol to format your response.