| Summary: | 1. The effect of concentration of alkali on the initial rate of attack of vitreous silica was measured at 80°C for LiOH, NaOH, KOH, RbOH and CsOH. Maximum rates of attack were observed at concentrations of 5 N for NaOH and 10 N for KOH. 2. The effect of temperature on rate of attack was measured in the range 60°C to 90°C for NaOH and from 70°C to 90°C for KOH. 3. For a given concentration, the order of a decreasing attack is NaOH, KOH, LiOH, RbOH and CsOH. 4. With 95% ethanol and 100% methanol as solvent for NaOH and KOH, the rate is nil. 5. With crystalline silica in aqueous alkali, the rate of attack is about 1/8 of vitreous silica. === Science, Faculty of === Chemistry, Department of === Graduate
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