2021-2022学年九年级全一册化学鲁教版（五四制）暑假提前学（6）溶液的酸碱性
※题型：单选题※知识点：单选题※试题难度：容易<br>根据下表判断,肉类变质过程中酸碱性的变化趋势是( )<br><tbody><br>名称<br>新鲜肉<br>次鲜肉<br>变质肉<br>pH<br>5.8-6.2<br>6.3~6.6<br>>6.7<br></tbody><br>A.酸性不变 B.酸性变强 C.酸性变弱 D.碱性变弱<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/43be576835ae439f857f2ee6950a4af3/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/e14ed98871584764a6a06d8b8ab0a997/AA521A301B38EDE5F8C54B6B22479FAE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关测定氢氧化钠溶液pH的实验操作或描述,你认为正确的是( )<br>A.用镊子夹取pH试纸直接伸入氢氧化钠溶液中测量<br>B.先用蒸馏水将pH试纸润湿,再用滴管吸取氢氧化钠溶液滴到pH试纸上测量<br>C.用洁净干燥的玻璃棒蘸取氢氧化钠溶液滴到pH试纸上,再与标准比色卡对照<br>D.用pH试纸测得该氢氧化钠溶液的pH=12.6<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/be504676b2ab416981b66a7b8d882bd4/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/6cdd3289c8d146cc946d7f2a2d4c9652/1D35C8936B0A7CCDCBB3DFA9DDC11FC0.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>一些物质的pH范围如下,其中呈酸性的是( )<br>A.草木灰水(10.3~11.1) B.鸡蛋清(7.6~8.0)<br>C.液体肥皂(9.5~10.5) D.酱油(4.0~5.0)<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4b037b651b4d4f96bf862e0ec3ab1f8b/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/cc10ac04e234457082e522c701298e28/75D34121982602B1757A354160DF09D9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>每种植物都有适宜自己生长的酸碱性环境。下表为四种作物适宜生长的pH范围:<br><tbody><br>作物<br>水稻<br>茶树<br>玉米<br>马铃薯<br>pH<br>6.0~7.0<br>5.0~5.5<br>7.0~8.0<br>4.8~5.5<br></tbody><br>某土壤浸出液能使紫色石蕊溶液变蓝色,该土壤适宜种植的作物是( )<br>A.水稻 B.茶树 C.玉米 D.马铃薯<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/432a0ee756d446b994a971905505329a/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/7914f3c164794acd8a9ffeddc2a27177/56B6F07E91AAA2689E875BE78EAF7A6D.png"><br><br>
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