في المنزل شرح تفصيلي لأبسط طريقة لصنع محلول صناعة الدوائر الالكترونية скачать в хорошем качестве

في المنزل شرح تفصيلي لأبسط طريقة لصنع محلول صناعة الدوائر الالكترونية

يستخدم مركب كلوريد الحديد الثلاثي في أحواض الصباغة وفي المطابع. يستخدم بشكل واسع كمادة كاشطة etching وذلك للخواص المؤكسدة القوية خاصة في مجال الإلكترونيات. Cu + 2FeCl3 → CuCl2 + 2FeCl2 الشكل اللامائي من كلوريد الحديد الثلاثي يعد من أحماض لويس القوية لذا يعد من الحفازات المهمة للتفاعلات الكيميائية، من أشهرها تفاعل ألكلة فريدل كرافتس. شرح تفصيلي لأبسط طريقة لصنع محلول الكلوريد الحديديك في المنزل A useful chemical to etch copper clad printed circuit boards. Start with 20g of iron. I’m using iron nails but steel wool also works. Just use whatever iron source is cheaper for you. Now add to it 100mL of water and then add 100mL of concentrated 12M hydrochloric acid. The acid should start dissolving the iron. This can take a couple of days if you’re using nails. Steel wool dissolves within a few hours but if you’re impatient like me you can speed up the dissolution by heating up the mixture. I’m going to put this round bottom flask of cold water on top to recondense any vapors. And there it goes. Obviously if you’re going to boil acid do this outside or in a fume hood. What’s happening at this point is the iron is reacting with the acid to produce hydrogen gas and green iron (II) chloride also known as ferrous chloride. Once the iron is completely dissolved turn off the heating and let it cool. If any of the acid evaporated or boiled off just top it up with more acid until the total volume is back to 200mL. Now with lots of stirring slowly add 200mL of 3% hydrogen peroxide. Do this in small portions since the mixture will heat up a lot. If it gets too hot to hold slow down and wait for it to cool before adding the rest. What we’re doing here is oxidizing the ferrous chloride into iron (III) chloride, better known as ferric chloride. If you don’t want to use hydrogen peroxide then a cheaper way to oxidize it is to bubble air through the solution using an aquarium pump. Okay I recommend using something a bit stronger than this pathetically weak pump but it will still work. Over the course of several days the oxygen will slowly react with the ferrous chloride to produce ferric chloride. This also has the added advantage of keeping the solution more concentrated than the hydrogen peroxide method. Of course the hydrogen peroxide method is faster if you’re impatient. Anyway, however you oxidize it, it’s now ready for etching printed circuit boards. To test it we just stick in a small strip of bare copper clad board. After a few minutes we have etched off the copper. Obviously in an actual PCB production run you would stir the mixture so you don’t get that small piece of unetched copper at the bottom. Anyway we have successfully made ferric chloride. You can store it as is or you can evaporate it to get ferric chloride crystals that take up much less space. Thanks for watching, Please subscribe, like and comment.