Table 7 Summary of groups’ most frequently used justifications for predicting NaI and sucrose conductivities in water
From: The influences of group dialog on individual student understanding of science concepts
Group # | Group’s prediction and reasoning of NaI conductivity in water | Group’s prediction and reasoning of sucrose conductivity in water | ||
|---|---|---|---|---|
Group’s prediction and reasoning of NaI conductivity in water | ||||
Prediction | Reasoning | Prediction | Reasoning | |
1A | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • It is a molecular compound and will stay together |
1B | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • It is a molecular compound and will stay together |
1C | Conducts | • NaI is ionic compound that will separate into ions in water | Would conduct | • Water molecules will still be touching and water conducts |
1D | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • It is a molecular compound and will stay together |
2A | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • It is a molecular compound and will stay together |
2B | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • It is a molecular compound and will stay together |
2C | Conducts | • Salt water conducts | Would conduct | • Water molecules will still be touching and water conducts |
2D | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | – |
3A | Conducts | • NaI is ionic compound that will separate into ions | Would not conduct | • They are all non-metals |
• There is not a metal bond between the ions | ||||
3B | Conducts | • NaI will dissolve completely | Would not conduct | • If you double the molarity, you double [conductivity] values |