A polar commercial antacid contains both Al(OH)3 and Mg(OH)2. Are these compounds Arrhenius bases, Brønsted-Lowry based, or both? Explain your answer.
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Answer:
Magnesium hydroxide, Mg(OH)2, is an Arrhenius base and therefore also a Brønsted-Lowry base.
However, water can also act as a base by accepting a proton from an acid to become its conjugate base, H3O+. where Al(OH)3 is acting as a Lewis Base.
Explanation:
Arrhenius acids and bases
An Arrhenius acid is any species that increases the concentration of H+start text, H, end text, start superscript, plus, end superscript in aqueous solution.
An Arrhenius base is any species that increases the concentration of OH−start text, O, H, end text, start superscript, minus, end superscript in aqueous solution.
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Fill the 25-ml graduated cylinder with 11.5 mLof water, what’s the volume?
b. False
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Answer: The given statement is false.
Explanation:
A chemical reaction is a reaction which brings change in chemical composition of reactants resulting in formation of new compounds which have different chemical properties.
For example,
So, when gas is produced in a chemical reaction then it means new compounds are formed due to breakage of old bonds and formation of new bonds.
Thus, we can conclude that the given statement gas produced from a reaction is a phase change and not a chemical change, is false.
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Answers
When a catalyst is added to a system the equilibrium concentration remains unchanged. A catalyst increases the activation energy of the forward reaction. The correct option is 2.
What is a catalyst?
A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst usually participates in the chemical reaction and it speeds up.
In short, the catalyst lowers the energy barrier and thereby provides a different path of lower activation energy for the reaction so that the rate of the reaction increases.
A catalyst speeds up both the forward and backward reactions to the same extent and does not alter equilibrium constant. Thus it speeds up the attainment of equilibrium faster.
Thus the correct option is 2.
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And increase the rate of the backward to the same extent thus not affecting equilibrium.
(3) 25.0 g of NaCl and 100. g of H2O
(4) 25.0 g of NaNO3 and 100. g of H2O
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Answer:
2
Explanation:
Because if look at the Solubity curves you will notice other three doesn't go 25 grams. They start above the 25 grams.
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Answer:
C. Heterogeneous
Explanation:
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Answer:
Explanation:
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