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Anonymous users2024-02-07100 ml of Alcl3 solution is contained.
According to 3NaOH + AlCl3 = Al(OH)3 + 3 NaCl Al(OH)3 + NaOH = Naalo2 + 2H20
Composed. When 100ml of NaOH solution is added, the precipitate produced can be inferred to be Al(OH)3, and a part of Al(OH)3 has been dissolved.
Then the amount of substance of NaOH =
Because 100 ml of NaOH solution is the amount of substance in NaOH solution with a concentration of 7 mol l
The other case is that there is an excess of AlCl3, i.e., all the precipitates generated are Al(OH)3 and Al(OH)3
No dissolution occurs, only 3NaOH + AlCl3 = Al(OH)3 + 3NaCl NaOH solution 100ml produces precipitation as Al(Oh)3= then the amount of NaOH substance =
Because 100 ml of NaOH solution then the concentration of the substance of NaOH solution is 3mol l
So the answer is cd
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Anonymous users2024-02-06You subject 100 ml of Alcl3 solution.
The data is wrong.
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Anonymous users2024-02-05100ml of AlCl3 2mol L then the molar mass is, the precipitate is Al(OH)3, you can calculate its molar mass is, indicating that AlCl3 is not completely used, according to the chemical reaction equation can be known that the ratio of Al(OH)3 to NaOH molar mass is 1:3, then the molar mass of NaOH is, and then multiplied to find the amount concentration of the substance is C
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Anonymous users2024-02-04I choose DBecause 3NaOH + AlCl3 = Al(OH)3 + 3NaCl, according to the question, AlCl3 is, if NaOH is insufficient, it should generate a precipitate, but now there is only one, so NaOH is excessive, and the precipitate is consumed, which can be calculated according to the one-to-one reaction between NaOH and Al(OH)3.
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Anonymous users2024-02-03ph=-lg[h+]
and ph = LG[c(H+)].
Therefore, the pH is about 14, K+, AlO2-, CO32-, and SO32- are all weak acid ions, which cannot exist in an acidic environment, but can exist in an alkaline environment.
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Anonymous users2024-02-02The reaction equation is 2H2+O2=2H2O1mol H2 is 2g
1000g is 500mol
2h2+o2=2h2o
500 xx should hail for 250
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Anonymous users2024-02-01Eliminate allergic sensitization and consume h 1000g
Soshixun consumes hydrogen H2 500g
The mass of hydrogen is 2g mol
The amount of hydrogen consumed is about 250mol
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Anonymous users2024-01-31At the same time, the consumption of hydrogen is about how many mol. Which stupid chain?? It's about how many mol of oxygen gear is consumed at the same time, right?
2H2+O2=2H2O, 1000g of hydrogen, i.e. 500molH2O, the oxygen consumed in the reaction is half of the hydrogen, i.e., 250mol
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