化学与生产、生活密切相关．下列叙述错误的是（　　）

    I'm Lucy. I have a happy family. There are four people in my family. My birthday is on January 1st. It's New Year's Day, too. My family and I will have a big dinner on that day. I have a little brother. He is four years old. His birthday is in winter. It's very cold but we can make a snowman. My mother's birthday is in March. My father's birthday is in March，too. We can plant trees and fly kites.

 济宁是山东省重要的煤炭能源基地，矿区废水中Fe²⁺、Cu²⁺、Zn²⁺等严重影响着当地水质，某污水处理厂采用下面工艺（见图）净化这种酸性废水并回收Fe²⁺、Cu²⁺、Zn²⁺三种离子，请读识流程图并回答：

（1）矿区废水经氧化池后在进入沉淀池Ⅰ，目的是____ ；

（2）利用氢氧化钠调节沉淀池Ⅰ、沉淀池Ⅱ和沉淀池Ⅲ的pH，目的是____；

（3）出水前，中和池中加入硫酸的作用____；

（4）若矿区废水中主要含有硫酸盐，请写出沉淀池Ⅲ中发生反应的化学方程式：　____ 　．