CHEMISTRY HIGH SCHOOL

Which substance is always a product when an Arrhenius acid in an aqueous solution reacts with an Arrhenius base in an aqueous solution?(1) HBr (3) KBr
(2) H2O (4) KOH

Answers

Answer 1
Answer:

Answer: Option (B) is the correct answer.

Explanation:

According to Arrhenius, acid are the substance that produce hydrogen ions when dissolved in a solution.

For example, HBr \rightarrow H^(+) + Br^(-) shows that HBr is an Arrhenius acid.

Whereas Arrhenius bases are the substances that produce hydroxide ions when dissolved in a solution.

For example,  KOH \rightarrow K^(+) + OH^(-) shows that KOH is an Arrhenius base.

Therefore, when an Arrhenius acid in an aqueous solution reacts with an Arrhenius base in an aqueous solution then following reaction occurs.

                  HBr + KOH \rightarrow KBr + H_(2)O

Thus, we can conclude that out of the given options, KBr is the product.
Answer 2
Answer: The answer is (2). The question only ask the production of acid reacts with base. The acid has H+ ion and base has OH- ion. When they react, the production will always contain H2O.

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Can someone pls help me I appreciate it

Answers

Answer:

b, e, f

Explanation:

Which statement correctly describes the relationship between reactant and yield? The actual yield is calculated from the amount of the excess reactant present.The actual yield is calculated from the amount of the limiting reactant present.

The theoretical yield is calculated from the amount of the excess reactant present.

The theoretical yield is calculated from the amount of the limiting reactant present.

Answers

Answer: the fourth stament, The theoretical yield is calculated from the amount of the limiting reactant present.


Justification:


1) Limiting reactant is the one that is in less proportion than the theoretical mole ratio.


2) Excess reactant is the one that is in greater proportion than the theoretical ratio.


3) For example, if you have the equation A + 2B → C, means that 1 mol of A react with 2 moles of B to yield 1 mol of C.


As per that equation, the theoretical mole ratio is 1 mol of A : 2 moles of B : 1 moles of C.


If the actual amounts of A and B were 2 and 4, respectively, they were in the same ratio as the theoretical ratio, and all of the both reactants could react.


But if you had, for example, 2 moles of reactant A and 2 moles of reactant B, only one of the moles of A could react with the 2 moles of B, so B would be the limiting reactant: the whole 2 moles of B would react, while only 1 mole of A would reactant, and 1 mole of A would be left over (A is in excess).


Therefore, you cannot use the 2 moles of A to calculate the theoretical yield (since only 1 mole reacted), instead you must use the limiting reactant (B), which is the one that reacts completely.

A reaction that releases energy is called endothermic .


True or False

Answers

Answer: False

Explanation: Endothermic means it absorbs heat energy.

Write a balanced equation for each of the following reactions:the reaction of solid lithium with nitrogen to form solid lithium nitride.
the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide.
the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction.
classify the reactions in (a) and (b).

Answers

Synthesis Reaction

6Li(s) + N₂(g) ⇒ 2Li₃N(s)

Double Replacement Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s)

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

What is double replacement reaction?

  • A double-displacement reaction has the general formula AB + CD = AD + BC. Double-displacement reactions include the following examples: Ammonium Chloride, a salt, and sodium hydroxide, a base, combine to produce sodium chloride, hydrochloric acid, and water. In a double replacement process, the atoms of two compounds are switched, creating two new molecules.
  • Metals always replace metals, and nonmetals always replace nonmetals in single replacement processes.
  • Precipitates are frequently created by double replacement reactions when insoluble chemicals are created.
  • Checking to see if the cations exchanged anions with one another is the simplest technique to determine whether a reaction is a double displacement.
  • If the states of matter are mentioned, another indicator to look for is the production of a single solid product and watery reactants (since the reaction typically generates a precipitate)

To learn more about double replacement reaction, refer

brainly.com/question/23918356

#SPJ2
6Li(s) + N₂(g) ⇒ 2Li₃N(s) Synthesis Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s) Double Replacement Reaction

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

show me the steps for solving this problem how many grams of O2 are required to burn 46.0 grams of C5H12

Answers

(MM)C5H12=5x12+12x1=72g/mol
(MM)O2=2x16=32g/mol
Acoording to equation:
C5H12 + 8O2 => 5CO2 + 6H2O

The proportion between C5H12 and O2 is 1:8 in mol

So: 72/16=46/x finale x=10,2g of O2

Which statement must be true about a chemical system at equilibrium?(1) The forward and reverse reactions stop.
(2) The concentration of reactants and products are equal.
(3) The rate of the forward reaction is equal to the rate of the reverse reaction.
(4) The number of moles of reactants is equal to the number of moles of product.

Answers

(1) is wrong because at equilibrium both the reactant and the product are still being created they are just being created at the same rate meaning that

(3) is the answer. As the concentrations do not change, but the solution/system is still in dynamic equilibrium. 
I agree with the answer below (partial credit would go to her/him I guess) 
My answer I guess is more visual to explain 
1 says --> | <--   
2 is assuming because not all chemical system are the same although this could be true in some cases
3 says     -->   which is true because that's the def of Equilibrium
              <-- 
4-I don't get that one-sorry 
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