Answer:
See Explanation
Explanation:
An electrolyte is a solution which is able to conduct electricity. An electrolyte conducts electricity because of the presence of ions which move around in the solution.
Ba(OH)2 and H2SO4 are composed of ions; these ions are the charge carriers in solution and are responsible for the conductivity of the solution and the glow of the bulb.
When Ba(OH)2 and H2SO4 are mixed, the following reaction occurs;
Ba(OH)2(aq) + H2SO4(aq) -------->BaSO4(s) + 2H2O(l)
The formation of the BaSO4(s) precipitate removes the ions that are responsible for the conductivity of the solution hence the light bulb of the conductivity apparatus dims and eventually fades completely.
The process referred to here is <u>filtration.</u>
Answer:
0.196 M
Explanation:
First, we have to calculate the moles of sodium hydroxide.
moles = mass / molar mass
moles = 3.9280 g / (39.997 g/mol) = 0.098207 mol
It is important to realize that even though 300 mL is the volume of water firstly added to dissolve the hydroxide, the flask is then filled to the mark, meaning that the volume of the solution is 500 mL = 0.500 L.
The molar concentration of sodium hydroxide is:
The concentration is an intensive property, that is, it does not depend on the amount of matter. As a consequence, the concentration of the 50 mL of solution in the buret is the same as the concentration in the flask.
When vinegar was added to baking soda, A new product is formed as foam. Hence, it is s a chemical change.
<h3>What is chemical change ?</h3>
A chemical change results from a chemical reaction forming new products while a physical change is when matter changes forms but not chemical identity.
Foam up with carbon dioxide gas,all of baking soda can be made react and disappear into vinegar solution and thus chemical reaction completes.
Hence, When vinegar was added to baking soda, A new product was formed Hence, it is s a chemical change.
Learn more about chemical change here ;
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Coefficient <span>is the number in front of chemical formulas that represents the ratio of each substance shown in a balanced chemical equation.</span>