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Water purifier filter replacement is good or after-sales The water purifier filter element can be replaced by itself, but the premise is that you will change it. it is not difficult to know the key points of the replacement. the general filter element should be replaced by the pre-pp cotton filter element, if so, I hope the following steps can help you.1. close the water valve on the tee ball valve at the total water inlet of the water purifier, or close the total water inlet valve; open the net faucet to reduce the pressure of the front filter;2. using a water purification wrench, set up the filter bottle from the bottom of the front filter bottle, one holding the filter bottle cap, and the other rotating the wrench clockwise to screw the filter bottle (press firm, so as not to loosen the front filter connection );3. remove the contaminated filter element, remove the packaging of the New pp cotton filter element, and load the new pp cotton filter element;4. check whether the white plastic gasket in t
The main component of the ore is CuFeS2 (sulfur element 1 2 Price, iron element 2 price). It is the main raw material for industrial copper smelting. it is known that the ore is roasted in the air. (1) the amount of material of 92gCuFeS2 = 92g184g/mol = 0.5mol,According to the atomic conservation, the amount of substances that generate Cu and FeS is 0.5mol, 0.5mol,It can be seen from the conservation of sulfur atoms that the amount of SO2 material = 0.5mol × 2-0.5mol = 0.5mol,In the reaction, only the sulfur valence of SO2 was increased,By-The price increased to 4,Therefore, the amount of transferred electronic substances = 0.5mol X [4-(-2) = 3mol,Therefore, the answer is: 3mol;(2) it can be seen from the process flow,The gas produced by roasting I is SO2,Using magenta solution for inspection,The specific operation is: collect the appropriate amount of gas I into the magenta solution,The magenta solution faded,The heating solution is red,Therefore, the answer is: collect the appropriate amount of gas I into t
