Wednesday
October 1, 2014

Homework Help: 10th grade

Posted by anonymous on Sunday, August 16, 2009 at 4:14pm.

i neeed help determining whether the following changes are chemical or physical and why. i have some guesses but i wanted to have them verified. thanks. =)
1) mixing chalk and vinegar: chem. b/c it bubbles
2) mixing starch and iodine: physical b/c the iodine dissoles and the satrch falls to the bottom of the beaker, (but the mixture turns purple)
3) ammonia abd iron (III) chloride: physical b/c the mixture eventually settles out,(but there is a color change.)
please help me to verify. thanks

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Changes in Matter - Which of the following everyday activities are physical ...
Changes in Matter - Which of the following kitchen activities are physical ...
Changes in Matter - Which of the following geological changes are physical ...
year 7 science - Chemical and physical changes. please could someone help me i ...
Chemistry - Are the following physical or chemical: a. dew is dried by the sun a...
Chem Lab - Am I right? Classify the following properties of sodium metal as ...
Science - When you boil an egg, the egg "white" changes from clear to white. The...
science - I dissolved two different white solids into water. One solid dissolved...
chemistry - I want to make sure I am correct in classifying whether the ...
7th Grade Science - what physical force can cause a change in the state of ...

Search
Members