A 0.3205 g sample of CaCO3 was dissolved in HCl and the resulting solution was diluted to 250.00 mL in a volumetric flask.
From this volumetric flask, 25.0 mL solution was obtained and titrated against EDTA. A 18.75 ml of EDTA was utilized to reach the end point (Eriochrome Black T used as
the indicator)
Calculate the moles of CaCO3 used:
Hint: Moles = g/MW Use 20ca40 6C12 and 8016

100mg magnesium reacts with 20ml of 1.0m hcl

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

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