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【毎日一問】理論基礎 2020.07.18

2020-07-18View Original

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選択問題:現在、100mlの硫酸があり、その質量分率は98%、密度は1.84g・ml⁻¹である。この硫酸の物質量濃度は( ) A、18.4mol.L⁻¹ B、18.8 mol.L⁻¹ C、18.0 mol.L⁻¹ D、1.84mol.L⁻¹ 答え:A ヒント:解法の過程を説明できた人には追加の報酬が与えられます。答えは返信で確認できます
Reply #22020-07-18
A、18.4mol.L-1
Reply #32020-07-18
D、1.84mol.L-1
Reply #42020-07-18
濃硫酸中のH2SO4の物質量=(100×1.84×0.98)/98=1.84mol 物質量濃度=1.84/0.1=18.4、うーん、その後の単位はスマホではどうやって入力すればいいかわからない!だからAを選ぶ
Reply #52020-07-19
A.(100×1.84×98%/98/0.1=18.4)
Reply #62020-07-21
A、18.4mol.L-1

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