Chemistry, 16.06.2021 14:00 hello137348474747

1. Để xác định hàm lượng H3PO4 người ta hút 5ml dung dịch cần xác định, hòa tan định mức thành 250ml. Lấy 10ml sau khi định mức, đem chuẩn trực tiếpvới NaOH 0,086N chỉ thị phenolphtalein. Thể tích NaOH tiêu tốn cho quá trình chuẩn độ là 15,75ml. Viết các phản ứng xảy ra ? Tính hàm lượng g/lit H3PO4 ?

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1. Để xác định hàm lượng H3PO4 người ta hút 5ml dung dịch cần xác định, hòa tan định mức thành 250ml...

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