Question

Potassium bromide is added to water and stirred. A salt solution is obtained which is then boiled leaving behind a residue. a. Is the above change physical or chemical? _______________________________________________________ b. Name the residue which is left behind after the salt solution is boiled. _______________________________________________________ c. Is there a change in chemical composition and properties of the original substance? _______________________________________________________ d. If calcium carbonate is used in place of potassium bromide, will the above experimentation be possible? Justify your answer. _______________________________________________________

Answer 1

potassium chloride is added to water and stirred. A salt solution is obtained which is the

boiled leaving behind a residue

a) Is the above change physical or chemical

b) Name the residue which remains behind after the salt solution is boiled

c) Is the change reversible or not reversible.

dj Are the composition and properties of the original substance altered.

e] Give a reason why the above experimentation would not be possible, if calcium carbonate

is taken, in place of potassium chloride