information to part B provided in written note

In Part B. 2 why are four 10mL portions of distilled water added to the SiO2 solid? What sources of error does this minimize? Part B 1. mass of ED and sample a fter heating (59.1615g) 2. mass of ED (55.6972g) 3. mass of remaining somple after henting (3.4643.) 4. mass of NH4Cl in originat sampre (1.2arg) In Part B. 2 why are four 10mL portions of distilled water added to the Si02 solid? What sources of error does this minimize? (a) If all the NaCl is not extracted in Part B.2, is the reported %SiO2 high or low? Explain. (b) If all the NaCl is not extracted in Part B.2, is the reported %NaCl high or low? Explain