50 ml & nbsp; 20% dilute sulfuric acid (density 1.14 g / cm3) was prepared with 98% concentrated sulfuric acid (density 1.84 g / cm3), and water should be poured into the beaker first___ Ml, and then___ Ml & nbsp; 98% concentrated H 2SO 4 was slowly injected into water and continuously stirred

50 ml & nbsp; 20% dilute sulfuric acid (density 1.14 g / cm3) was prepared with 98% concentrated sulfuric acid (density 1.84 g / cm3), and water should be poured into the beaker first___ Ml, and then___ Ml & nbsp; 98% concentrated H 2SO 4 was slowly injected into water and continuously stirred

(1) It is known that 50 ml of 20% dilute sulfuric acid (density 1.14 g / cm3) is to be prepared, 98% concentrated h2so4xml is applied, and the formula is x × 1.84 × 98% = 50 × 1.14 × 20% according to the mass of solute before and after dilution, and x = 6.3 ml. (2) because 50 ml of 20% dilute sulfuric acid (density 1.1