Before Experiment Mass (g) After Experiment Mass (g)
Tablet 25
Water 10
Baggie 4
Total 39 Total 38

Matt and Juan are studying chemical reactions and the law of conservation of matter in science. Each lab group conducted an experiment to verify the law. The boys materials can be seen in the data table: antacid tablet, water, and a zip lock baggie. They found the mass of all the materials and recorded the mass in grams in the table as well, then calculated the total mass of the system. Matt placed the tablet in the baggie and then Juan poured in the water. The boys closed the baggiewaited until the tablet disappeared. When the reaction was completed, they found the mass of the system again. Note their results in the data table. Elaborate on the most logical reason why the data did not support the law of conservation of matter.
A) The boys did not know how to use the balance properly.
B) The reaction produced gas bubbles and they have no mass.
C) Some of the water evaporated and could not be massed as a product in the reaction.
D) Some gas escaped from the baggie before the boys had it completely closed.

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback