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How to check whether the Yin and Yang ion content measured is correct? Determination of sulfate content (Method 1) This method is applicable to sulfate in water (-The content is not less than 10 mg/L.1. method: the reaction of sulfate with barium chloride under acidic conditions,The formation of barium sulfate precipitation,After filtration, drying and weighing,The content of sulfate can be found according to the mass of BA sulfate.2. reagents and materials ① hydrochloric acid solution (1 );2 Solution of barium chloride (BaCl2.2H2O) (100g/L );3 silver nitrate solution (17g/L );(4) methyl orange indicator liquid (1g/L );3. instruments and equipment general laboratory instruments and filter plate aperture 5 ~ 15?Crucible filter for m.4. the analysis steps are filtered by slow filter paper.Remove a certain amount of filtered samples with a transfer tube,Put in 500 beaker.Add 2 drops of orange indicator liquid,Drip with hydrochloric acid solution to red and excess of 2 mL,Add water to a total volume of 200.Boil f
What equipment do you need to raise sea fish? To raise marine fish, you should know that there is a dynamic buffer system for hardness and pH in seawater,It can keep the water quality of the seawater stable, when the pH value of the seawater drops to 8.0,We can consider the approach of supplementing carbon dioxide,To maintain the stability of the buffer capacity of water quality,There are two ways to replenish carbon dioxide in seawater,Here is a specific introduction.(1) Sea Aquarium: the specifications of the Sea Aquarium are larger than those of the fresh water aquarium,It has a large capacity,The height of the aquarium is also high.The specifications of the aquarium for home viewing are: 70x35x45/cm, 130x55x65 cm, 160x65x65/cm, 180x65x70 cm.The specifications of the aquarium for the exhibition are: 150x60x90 cm, 200x60x90 cm, 300x90x90 cm, etc.The materials of the Sea Fish Aquarium are more than 10mm thick glass,Use a thick color of gray, black or brown silicone as the adhesive.Transparent silic