An excess of copper(II) oxide is added to dilute sulfuric acid to make crystals of hydrated copper(II) sulfate.
The processes listed may be used to obtain crystals of hydrated
copper(II) sulfate.
1concentrate the resulting solution
2... filter
3heat the crystals
4... wash the crystals
...Which processes are needed and in which order?
Question 8
1, 2, 3 and 4
1, 2, 4 and 3
2, 1, 2 and 4
2, 1, 2 and 3

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Why are people not able to scuba dive in the deep part of the ocean

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)