what are the steps needed to prepare pure copper(II) Sulphatee crystals?
copper(II) sulphate is a soluble salt 1. a measuring cylinder is used to measure 50 cm3 of 2 mol/dm3 sulphuric acid into a beaker. the acid is carefully heated. 2. a spatula is used to add copper powder bit by bit with stirring to the hot acid until some of it no longer dissolves. 3. the unreacted copper powder is remove by filtration. the filtrate is poured into an evaporation dish. 4. the salt solution is gently heated to evaporate the solution to obtain a saturated solution. 5. the hot saturated solution is allowed to cool for crystallisation to take place. 6. the crystal formed are filtered out, washed with a little cold distilled water and dried between sheets of filter paper. 7. recrystallisation is carried out to obtain pure crystals of copper (II) sulphate
All of these answers are great help but have you considered that perhaps you still have water in your pipes? You may think you are doing everything correctly but if there is even a single drop of water getting to your pipes, the solder will melt but the joint will not hold.
You have to carefully prep the joints where they will contact. That means cleaning and flux. When soldering you should see a nice clean shiny bead of solder all around the joint filling it fully. Some plumbers will even let a drop of solder drip off when joint is full. the pipe should not move when done
Your soldering of copper is made one hundred% less complicated once you will solder with a Map gasoline torch as a replace of propane. no longer lots too it with map gasoline and it fairly works however in case you got a splash water interior the line as propane torch won't. as a thank you to start up get map gasoline to make your activity lots less complicated. On reducing out old pipe, you elect an electric observed called a SAWS ALL contained available in the industry. this is a portaable handheld reciprocating observed that has a pair of four to six inch recommend finding blade on it and have confidence me it may decrease via a metallic pipe with 0 attempt in much less that 40 5 seconds. Lowes or Depot or Menards have those issues for variety of $35 and each proprietor of a house desires one. On copper tubing, of direction use a tubing cutter and REAM out the interior the pipe with the attachment on the cutter. remember, there is likewise a mini tubing cutter for those tight places. purchase a variety of too. Then. sparkling with metallic wool and heat the setting up basically with the Map gasoline torch and feed interior the solder. no longer something to it fairly. Dont forget approximately a bucket of water in flow slowly and a moist rag to kick back off the fittings after soldering and snuff out any warm spots. fairly, ive yet to pay attention of a plumber placing hearth to a house mutually as setting up copper and neither has absolutely everyone else.
