Asolution is 0.010 m in both br2 and so422. a 0.250 m solution of lead(ii) nitrate is slowly added to it with a burette. a. which anion will precipitate first? b. what is the concentration in the solution of the first ion when the second one starts to precipitate at 25°c?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.