. Three students are asked to discuss the percent error obtained in this lab.
Select the student that employs correct scientific reasoning.
Student 1: The percent error could be caused by mixing the reaction too quickly, the friction
caused by mixing would increase the change in heat measured.
• Student 2: The percent error could be caused by the salt not completely dissolving, therefore the
change in heat per mole would be accidentally low.
. Student 3: The percent error could be caused by the change in pH of the solution, this would
decrease the change in heat accidentally.
O Student 2
O Student 3
O Student 1

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

explanation:

0.07 g/cm³

1.37 g/cm³