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علم کیمیا - ترکیبات نقره
یکشنبه 8 بهمن 1391  06:25 ب.ظ    ویرایش: - -
توسط: ک ی
نوع مطلب: شیمی ترکیبات ،

نقره در ترکیباتش اکثرا به صورت یک ظرفیتی است.اما اکسید فلوئورید و سولفید دو ظرفیتی نقره نیز مشاهده شده است.تعدادی از ترکیبات مهم نقره عبارتند از :
 

نیترات نقره AgNO3

ترکیبی بی رنگ و بسیار محلول است.اساسا سمی و به سادگی به نقره فلزی احیا می شود و از آن در تهیه ترکیبات دیگر نقره ،آینه های نقره ، جوهر ها استفاده می شود.






هیدروکسید دی آمین نقره
(Ag(NH3)2)OH
ترکیب کوئوردینانسیونی محلول در آب که به وسیله افزودن هیدروکسید آمونیوم به محلول های املاح نقره، تشکیل می شود.این ترکیب در اثر ماندن تشکیل ترکیب بسیار منفجره نقره فولمینات شده را می دهد.
 
 
 
 


سیانید نقره AgCN

مورد مصرف به وسیله سیانید سدیم یا پتاسیم اضافی در آبکاری برای تشکیل یون های کمپلکس.



کلرید نقره AgCl

ترکیب سفید نامحلول که در هیدروکسید آمونیوم حل شده تشکیل یون های کمپلکس می دهد.در عکاسی و نیز به عنوان آشکارکننده یونیزاسیون برای اشعه های کیهانی،کاربرد دارد.



برمید نقره AgBr

ترکیب نامحلول زرد روشن که نسبت به AgCl نامحلول تر است و بیشتر در عکاسی به مصرف می رسد.



یدید نقره AgI

ترکیب نامحلول زرد رنگ و نامحلول تر از AgBr است و برای اصلاح وضعیت ابرها به منظور بارندگی Cloud Seading و در عکاسی کاربرد دارد.



سولفید نقره Ag2S

نامحلول ترین نمک نقره ،سیاه رنگ و جزء اصلی تشکیل دهنده تیرگی ظروف نقره می باشد.
 
 
 
 

منبع : مجله اطلاعات علمی - شماره 356 - اردیبهشت 1388 - ص 47
 

   


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