In the experiment of analysis of cement in labs, cement contains more chemical elements. now I like to estimate the amount of silica in cement. how?
The amount of silica would normally be measured in the raw mix before it is put into a cement kiln otherwise its too late to modify it. Its done by X-ray fluorescence
well the answer is very simple........... you know i suppose that NaOH reacts with silica to give sodium silicate? and sodium silicate is basic in nature/....... so just take a sample of cement make a solution of it.... or maybe a suspension , weigh it and start adding NaOH until the indicator (phenolphthalein) changes colour..... the reaction is...... NaOH+SiO2---------->NaSiO3+H2O just balance the reaction and there you have your answer...........
