为什么在肥皂水里加糖会吹出很大的泡泡,加醋会吹出许多小泡泡? 因为糖也是有机大分子,而且比硬脂酸盐分子的结合力还要大.因此加过糖的肥皂水具有更大的表面张力,可以吹出很大的泡泡.醋里所含的醋酸就会与硬脂酸盐分子反应,从而使肥皂水表面张力变小,还可以吹出较小的泡泡.
英语翻译 1 TaoLuo placed within the tao,glutinous rice in static water clean after 15 minutes.Drain and water,then pour in the tub,rice in sugar,salt,soy sauce,agitate little red.2 the zong leaf 400 grams,rinse water to skillet,and cook,soft.Drain and drain.3 the pork,according to wash the wire cut fat,thin,respectively,in finite small bowl,add liquor,monosodium glutamate and the rest of the red sauce,refined salt,purified stirring until frothy sand.4 take 3 lunar surface,hairy,put 1/3 glutinous rice,add FeiShou meat,add 2/3 of glutinous rice dumplings wrapped with wet malan triangle,lazio,namely to fasten the bundle dumplings.5 the package dumplings into the pot,add water.Cook for 2 hours in each,reoccupy small fire stew about 3,serve.
为什么;少许白糖放入水中,搅拌后白糖\ 一种物质(溶质:白糖)以离子或分子均匀地分布于另一种物质(溶剂:水)中所得到的稳定状态的液体叫做(糖水)溶液.那么溶液的形成过程叫溶解.下面几个概念与此题有点连糸,(1)溶液是由溶质和溶剂组成,分水溶液和非水溶液(2)溶液中各成分的相对含量在很大的范围内改变,溶质和溶剂是相对而言的.(3)溶解过程往往伴随着热量的吸收或放出.(4)伴随着体积和颜色的改变.(5)溶解过程一定会达到平衡叫溶解平衡.(6)物质在溶解时,由溶质分子或离子和溶剂分子能形成不很稳定的或相当稳定的溶剂合物叫水合物,当溶质结晶出来时,水也参加在晶体中叫结晶水.