Copper (II) sulfate exothermically dissolves in water to give the aquo complex [Cu(H 2 O) 6 ] 2+ , which has octahedral molecular geometry and is paramagnetic. Other names for copper(II) sulfate are blue vitriol and bluestone.hen water is then added to the anhydrous compound, it turns back into the pentahydrate form, regaining its blue color, and is known as blue vitriol. Copper(II) sulfate pentahydrate can easily be produced by crystallization from solution as copper(II) sulfate is quite hygroscopic.
The harmonica is a small, versatile instrument played in nearly every kind of music and most cultures the world over. Though it may seem confusing to learn at first glance, the harmonica is actually an easy and fun instrument to get started playing. Read the steps below to learn how to play a harmonica.
Most recorded harmonica you hear is done in crossed (or second) position. Basically what this means is that the harmonica used is not in the same key as the song. Learning this is THE big step toward learning how to play blues harmonica. Many harmonica players spend years without knowing which harmonica to choose when they know what key the song is played. In second position the draw chord becomes the song key instead of the blow chord. See the following chart to select the correct harmonica for playing crossed harp (second position) in any song key. Note that the harmonica you want to use is 5 half tones above the key the song is being played in.