粗大浓稠硕大噗嗤噗嗤h,精品人妻码一区二区三区,国产av无码专区亚洲精品,日韩a片无码毛片免费看小说

\r規(guī)格：50ml，100ml，150ml，250ml，500ml，1000ml，2000ml，3000ml，5000ml，10000ml，20000ml等多規(guī)格。<\/b><\/span><\/span>\r<\/p>\r

\r介紹：<\/strong><\/span>\r<\/p>\r

\r1：圓底燒瓶為<\/strong><\/span>底部<\/strong><\/span>呈<\/strong><\/span>球<\/strong><\/span>狀<\/strong><\/span>的<\/strong><\/span>透明<\/strong><\/span>玻璃<\/strong><\/span>燒瓶<\/strong><\/span>。它是一種<\/strong><\/span>化學(xué)實(shí)驗(yàn)<\/strong><\/span>中常用的<\/strong><\/span>加熱<\/strong><\/span>與反應(yīng)容器，用途廣泛。可以進(jìn)行加熱，一般要墊上<\/strong><\/span>石棉網(wǎng)<\/strong><\/span>，與<\/strong><\/span>鐵架臺(tái)<\/strong><\/span>等<\/strong><\/span>夾持<\/strong><\/span>儀器<\/strong><\/span>配合<\/strong><\/span>使用。<\/strong><\/span>\r<\/p>\r

\r2:<\/strong><\/span>圓底燒瓶,口比較細(xì),可以防止液體流出,可以進(jìn)行長(zhǎng)時(shí)間<\/strong><\/span>加熱<\/strong><\/span>,但必須墊<\/strong><\/span>石棉網(wǎng)<\/strong><\/span>。<\/strong><\/span>\r<\/p>\r

\r3:<\/strong><\/span>圓底燒瓶可以密閉加熱大量液體,還可以進(jìn)行<\/strong><\/span>噴泉實(shí)驗(yàn)<\/strong><\/span>。<\/strong><\/span><\/span>\r<\/p>\r

\r<\/span>\r<\/p>\r

\r
\r<\/p>\r

\r使注意事項(xiàng)<\/strong><\/span>\r<\/h2>\r

\r（1）圓底燒瓶底部厚薄較均勻，又無(wú)棱出現(xiàn)，可用于長(zhǎng)時(shí)間強(qiáng)熱使用。<\/strong><\/span>\r<\/h2>\r

\r（2）<\/strong><\/span>加熱<\/strong><\/span>時(shí)<\/strong><\/span>燒瓶<\/strong><\/span>應(yīng)放置在<\/strong><\/span>石棉網(wǎng)<\/strong><\/span>上，不能用火焰直接加熱。<\/strong><\/span>鐵溶液的圓底燒瓶<\/strong><\/span>\r<\/h2>\r

\r
\r<\/p>\r\r（3）實(shí)驗(yàn)完畢后，若有導(dǎo)管等，一律先撤去導(dǎo)管，防止倒流，再撤去熱源，靜止冷卻后，再行廢液處理，進(jìn)行洗滌。<\/strong><\/span>\r<\/div>\r

\r燒瓶<\/strong><\/span>加熱時(shí)要墊上<\/strong><\/span>石棉網(wǎng)<\/strong><\/span>，不超過燒瓶體積的1/2（怕太多溶液在<\/strong><\/span>沸騰<\/strong><\/span>時(shí)容易<\/strong><\/span>濺<\/strong><\/span>出或是<\/strong><\/span>瓶<\/strong><\/span>內(nèi)<\/strong><\/span>壓力<\/strong><\/span>太大而**）。<\/strong><\/span>\r<\/p>\r

\r
\r<\/p>\r

\r
\r<\/p>\r

\r圓底燒瓶與平底燒瓶的區(qū)別<\/strong><\/span>\r<\/h2>\r

\r圓底燒瓶底部為圓形，而<\/strong><\/span>平底燒瓶<\/strong><\/span>底部為平的。實(shí)驗(yàn)時(shí)圓底燒瓶要用<\/strong><\/span>鐵架臺(tái)<\/strong><\/span>放置，而平底燒瓶可直接放置于實(shí)驗(yàn)臺(tái)上。<\/strong><\/span>\r<\/h2>\r

\r
\r<\/p>\r<\/strong><\/span>圓底燒瓶與蒸餾燒瓶的區(qū)別<\/strong><\/span><\/span>\r\r蒸餾燒瓶<\/strong><\/span>由于需要用于<\/strong><\/span>蒸餾<\/strong><\/span>液體，因此在瓶頸處有一略向下伸出的細(xì)玻璃管，可用于引流蒸汽。另由蒸餾燒瓶加熱需要堵住瓶口知，必有另一管伸出。<\/strong><\/span>\r<\/div>\r\r而圓底燒瓶則無(wú)此裝置，瓶頸即為普通直管。<\/strong><\/span>\r<\/div>\r<\/span>\r\r
\r<\/div><\/div>