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1.9 mL to 8.7 mL
KOH(aq) + NaCl(aq)
=> NaClaq + H2O + heat
Titration
It happens to be because of the law of phisics. In my class in collage it means table salt.
All chemical reactions obey the law of conservation of matter.
When that solution is evaporated completely, only salt remains
NaOH(aq) + HCl(aq) ---> H2O(l) + NaCl(aq) Na+ + OH- + H+ + Cl- ---> H2O + Na+ + Cl-
Na+ plus OH- plus H+ equals H2O plus Na+ plus Cl-
when 2 chlori propane is reacted in presence of ethanolic koH it form propene .