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某同学学习了用pH试纸测定溶液pH的方法后,收集了家里的几种物质,测定结果是: (1)当蚂蚁、蚊子、蜜蜂等昆虫叮咬人时,会向人体注入一种叫蚁酸(具有酸性)的物质,使皮肤红肿、瘙痒,甚至疼痛。要减轻这种症状,在叮咬处涂抹__________或__________ _痛痒便会消失。| (2)测量厨房清洁剂pH时,pH试纸是否需要先用蒸馏水润湿________(填“是”或“否”),原因是______________。
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