Sodium bicarbonate is a base, dissolving it in water will increase the solution pH compared to neutral water. A saturated solution of sodium bicarbonate in water has a pH of roughly 9. A molecule will be deprotonated in water if its pKa is equal to or is lower than the pH of the solution. Using this information, you should be able to work out which of the protons has been removed in the form of a proton from curcumin in the presence of sodium bicarbonate. Required:
Draw the curved arrow pushing for the deprotonation of curcumin by the bicarbonate anion and give the products of this reaction (you do not need to include resonance contributors in the anion).

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, and calculate its density. here is a summary of the steps required: add water by clicking and holding prepare a known volume of water button. until the desired volume of water has been added. if more than the desired volume is added, click the reset button. button and redo the procedure. a single click will add about 21.0 ml of water. to set the mass, click and hold weigh out metal button. until the desired amount of metal is added to the weighing pan. once the desired mass of the metal is added, release the button. transfer the metal to water and then click on calculate density button. to see how the density is calculated using water displacement to measure the volume of the solid. to save time you can approximate the initial volume of water to â±1 ml and the initial mass of the solid to â±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? check all that apply.

Describe the interaction that occurs between two objects with the same electrical charge.

How does concentration affect reaction rate