题目

在学习盐的化学性质时，老师将一定量的碳酸钠溶液与氯化钡溶液混合，过滤反应后的混合物．老师要求同学们探究滤液中溶质的组成．请你一同参与探究并回答有关问题． 【查阅资料】碳酸钠溶液显碱性，氯化钠，氯化钡溶液显中性． 请你写出碳酸钠溶液与氯化钡溶液反应的化学方程式 ． 【提出猜想】 猜想1：滤液中溶质是NaCl； 猜想2：滤液中溶质是NaCl和 （填化学式）的混合物； 猜想3：滤液中溶质是NaCl和Na2CO3的混合物； 【实验探究】 （1） 阅读短文回答问题。根据短文内容回答问题     What do you write down? For most of us, writing consists of emails, task lists and perhaps the odd work project. However, making time to write down certain things, such as our daily experiences and feelings, can help us in our life. The following are some different ways that writing things down can change your life. u       It clears your mind for higher-level thinking. David Allen, productivity speaker and author of Getting Things Done, recommends doing what he calls a “core dump”. This involves writing down every task, activity, and project you need to address. This could range from picking up milk on the way home, to a multi-person project at work. Writing down every ‘to-do’ item you can think of clearing space in your head for more important topics. u       It helps you process your emotions. Writing down what’s on your mind is a great way to work through inner conflict or process your feelings around a particular situation. It’s similar to talking a situation through with a friend, and it’s a useful way of strengthening your self-soothing (自我安慰) abilities. u       It gives you a record of the past. If you keep a diary and regularly write down your thoughts and feelings, you’ll soon have a record of your experiences that you might otherwise have forgotten. Keeping a diary can also enhance your levels of self-trust. When you can look back and see how successfully you’ve done in the past, you’ll feel more confident in your ability to do so in the future. u       You gain a sense of achievement. If you write down everything you need to do in a particular day or week, you gain an additional sense of satisfaction. When having completed the task, you can cross the item off our list. Feeling productive enhances your productivity and fosters a sense of achievement and progress. 1. Can writing down things help us in our daily life?  2. How many ways can writing down things help us change our life? 3. According to David Allen’s idea, what does a “core dump” mean? 4. What is the advantage of keeping a diary?   5. What is the passage mainly about?