24、完成下列反应的离子方程式:

(1)在NaOH溶液中加入NH4Cl并加热:

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(2)铜与浓硝酸的反应:

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(3)氢氧化铁溶于盐酸:

                                                                

(4)铝单质溶解在氢氧化钠溶液中:

                                                         

 

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