Sl no Ash taken (gm) Naoh taken (gm) Vol of naoh (ml) Vol of silicate (ml) Specific gravity % silica in solution Undigested ash (gm) % silica digested
1 40 40 500 375 1.114 4.75 6.8 63.46
2 50 40 500 340 1,124 6.33 9.7 66.14
3 60 40 500 305 1.13 7.12 12.4 67.089
4 70 40 500 345 1.132 8.49 15.3 68.66
5 80 40 500 275 1.14 8.907 20.1 71.19
6 90 40 500 260 1.146 9.829 22.5 62.57
Table 5: Digestion of rice husk ash for 1 hour in 2N NaOH solution.