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2018年中考化学真题分类汇编3化学实验与探究考点15化学实验常用仪器和基本操作3综合实验4误差分析（无答案）.doc

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2018年中考化学真题分类汇编3化学实验与探究考点15化学实验常用仪器和基本操作3综合实验4误差分析（无答案）.doc_第1页
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1化学实验常用仪器和基本操作（18 达州）16.误差分析是定量实验的一个重要内容，下列分析正确的是A.用量筒量取 10mL 水，仰视读数，会导致水的实际体积偏小B.测定溶液的 pH，先用水将 pH 试纸润湿，会导致测出的 pH 偏大C.测定空气中氧气的体积分数，铜粉的量不足，会导致测出氧气的体积分数偏小D.配制 6%的氯化钠溶液，氯化钠中含有杂质，会导致氯化钠的质量分数偏大

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