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کلاس شیمی ما - آزمایشگاه شیمی

آزمایشگاه شیمی

تاریخ:سه شنبه 21 خرداد 1392-10:29 ق.ظ




شما می‌خواهید دوستانتان را به یک سری آزمایشهای جادویی از شیمی سرگرم سازید. بهتر است این کار را با یک سلام آتشین شروع کنید:
روی میز یک صفحه کاغذ قرار دارد. شما آن را به دست گرفته در حالیکه فندکی در دست دارید، به تماشاچیان تعظیم کرده و در ضمن ، فندک روشن را به کنار کاغذ می‌زنید. یک مرتبه کلمه سلام به خط درشت روی کاغذ ظاهر می‌گردد در حالیکه این نوشته شعله می‌کشد و تماشاچیان را غرق در شگفتی می‌سازد.

اجرای این آزمایش بسیار ساده است، اما شما ابتدا به وسایل زیر نیازمندید:


10 گرم نیترات پتاسیم که در 25 سانتی متر مکعب آب حل کرده اید.
یک قلم نقاشی کوچک
یک صفحه تقریبا بزرگ کاغذ ضخیم که در ضمن کمی قابل نفوذ باشد.

بعد از تهیه این وسایل ، ساعتها قبل از اجرای نمایش و دور از چشم تماشاچیان کلمه سلام را با محلول غلیظ نیترات به وسیله قلم نقاشی روی کاغذ مزبور بنویسید. پس از خشک شدن آن دوباره همین کلمه را روی آن مجددا بنویسید و این کار را چند بار تکرار کنید تا ضخامت این نوشته به حد کافی باشد. ضمنا باید تمام حروف این کلمه را به هم متصل کنید. به محض تماس فندک با یک نقطه از نوشته، قسمت‌هایی از کاغذ که به وسیله نیترات پتاسیم اکسید شده است می‌سوزد و ایجاد روشنایی می‌کند. به جای کلمه سلام می‌توانید کلمات مناسب دیگری به همین شیوه روی کاغذ بنویسید و آتش بزنید




فرض كنید شما به یك جلسه‌ی مهم دعوت شده‌اید، به محض ورود با صدایی عجیب در جا میخكوب می‌شوید :? هر قدمی كه برمی‌دارید صدای مهیبی به گوش می‌رسد و پس از چند حركت متوجه می‌شوید كه خودتان منبع صداها هستید!

با این مقدمه قصد دارم ماده‌ای جالب و نسبتا كم خطر را به شما معرفی كنم « تری یدید نیتروژن» ، ابتدا مواد لازم:

:idea: ید : 5 گرم
:idea: پتاسیم یدید : 3 گرم
:idea: محلول آمونیاك : 20 میلی‌لیتر

ابتدا ید و پتاسیم یدی را با هم مخلوط كرده و با هاون كمی می‌كوبید تا حسابی در هم نفوذ كنند. اگر تا به حال درب ظرف آمونیاك را باز نكرده‌اید به شما هشدار می‌دهم كه در آخر این كار را انجام دهید. با یك بار اشتباه مجانی ممكن است چند ساعت سوزش گلو و آب‌ریزش چشم داشته باشید :cry: بهتر است زیر هود یا هواكش از آمونیاك استفاده كنید.
در این مرحله آمونیاك را خیلی آهسته به مخلوط اضافه كرده و مخلوط را با یك قاشق چوبی یا پلاستیكی (با ملایمت خیلی زیاد) به هم می‌زنید.
پس از خشك شدن، پودر بمبی آماده است. این پودر با ضربه یا فشار منفجر شده و صدایی شبیه ترقه ایجاد می‌كند :o
شما می‌توانید مقدار خیلی كمی از آن را روی زمین ورودی یك سالن جشن بریزد تا همگی در هنگام ورود هیجان زده شوند. :P

توجه:
بعضی آدمها ممكن است جنبه‌ی شوخی بالایی داشته باشند، اما بر اثر یك صدای نا به جا سكته كنند :x بهتر است شما جنبه‌ی شوخی كردن خودتان را حفظ كنید و فقط در جاهای لازم و خنده‌دار (البته منظورم وقتی است كه همه بخندند) از این ماده استفاده نمایید.




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