题目

已知盐酸加到品红溶液中，使品红溶液的红色加深。试推测： （1）向品红溶液中通过量SO2的过程中的现象为__________；加热后的现象为_______。 （2）向品红溶液中通入过量Cl2的过程中，观察到的现象为____________。 （3）向品红溶液中通入物质的量比为1∶1且足量的SO2和Cl2后现象为___________。 答案：（1）溶液颜色先变深后又逐渐褪去  逐渐恢复原来的红色。 （2）溶液的颜色先变深后又逐渐褪去，不再恢复红色（或仍为无色）。 （3）溶液的红色比原来加深。 解析:当向品红溶液中通入过量的SO2时，发生如下反应：SO2+H2OH2SO3，生成的酸能使品红溶液红色加深，因SO2过量，SO2与品红溶液结合成不稳Mr. Brown isn't an old man. But he has a big family. There are six people in his family. They are his parents, his wife, his son and daughter. Mr. Brown's father is from Canada. His mother is from America. They don't work now. They are at home every day. Mr. Brown works on a farm and his wife is an English teacher. Their children－Kate and Mike are students. Mike's grandpa and grandma are under the tree. They are very happy.1.Is Mr. Brown an old man?（不超过3个单词）____________________________________2.Where is Mr. Brown's father from ?（不超过4个单词）____________________________________3.How many people are there in Mr. Brown's family ?（不超过3个单词）____________________________________4.Is Mr. Brown's wife a farmer ?（不超过3个单词）____________________________________5.Where are Mike's grandpa and grandma?（不超过5个单词）____________________________________