As shown in the figure, it is an experimental device for making ammonia with ammonium chloride and hydrated lime in the laboratory. Please answer the following questions: (1) Write the chemical equati

As shown in the figure, it is an experimental device for making ammonia with ammonium chloride and hydrated lime in the laboratory. Please answer the following questions: (1) Write the chemical equation for preparing ammonia _ (1) The method of making ammonia in the laboratory is to heat solid ammonium chloride and calcium hydroxide to produce ammonia, and the chemical equation of the reaction is 2NH4Cl+Ca(OH)2? △? . ? CaCl2+2NH3↑+2H2O，

So the answer is: 2NH4Cl+Ca(OH)2? △? . ? CaCl 2+2n H3 ↑+ 2H2O；

(2) The nozzle of test tube A must be slightly inclined downward to prevent the water generated during the reaction from flowing back into the test tube and causing the test tube to rupture.

So the answer is: to prevent the water produced during the reaction from flowing back into the test tube, so that the test tube is broken;

(3) Ammonia is very soluble in water, and the test tube must be dry when collecting, otherwise ammonia cannot be collected.

So the answer is: ammonia is very soluble in water;

(4) The method to check whether the test tube B is full of ammonia water is to use wet red litmus test paper near the mouth of test tube B, and the test paper turns blue to prove that it is full.

So the answer is: use a wet red litmus test paper near the B port of the test tube, and the test paper turns blue to prove that it is full;

(5) If the ammonia gas is 2.24L and the amount of substance is 0. 1mol under standard conditions, the amount of substance required by calcium hydroxide is 0.05mol, and the mass is 0.05 mol× 74g/mol = 3.7g according to the quantitative relationship of chemical equation.

So the answer is: 3.7.