Đun nóng 20 g một chất béo với dung dịch chứa 10 g NaOH. Sau khi phản ứng xà phòng hoá xảy ra hoàn toàn, phải dùng hết 100 g dung dịch HCl 6,57% để trung hòa lượng NaOH dư a) Tính khối lượng NaOH cần dùng để tham gia phản ứng xà phòng hoá 1 tấn chất béo nói trên. b) Tính khối lượng glixerol và khối lượng xà phòng chứa 72% muối natri của axit béo từ 1 tấn chất béo nói trên.

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