Propionic acid, C2H5CO2H (Ka = 1.34 × 10−5), is used in the manufacture of calcium propionate, a food preservative. What is the hydronium ion concentration in a 0.698-M solution of C2H5CO2H? White vinegar is a 5.0% by mass solution of acetic acid in water. If the density of whi...
same retarder in the same proportions was added to CL50_G50 (50% hydrated lime and 50% gypsum), designed to mould on-site elements for gypsum plaster decoration. G was produced for restoration of precast elements with 100% of calcium sulphate hemi-hydrate. All the percentages are by mass....
This was evaluated through TG and DTG analyses, wherein the mass of water that was lost during heating via a TA Instrument Q600 (Centro Servizi di Ateneo per la Ricerca, CeSAR—University of Sassari) was measured. Aliquots of approximately 20 mg of the powders stored under controlled ...