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Liono4ka [1.6K]
1 year ago
9

Is the pH greater than, equal to, or less than 7 after the neutralization of each of the following pairs of acids and bases? -NH

3 and HClO4 -NaOH and benzoic acid -KOH and HBr -(CH3)3N and HOBr
Chemistry
1 answer:
never [62]1 year ago
5 0

A strong electrolyte dissociates completely into its ions but in weak electrolyte only certain number of ions are dissociated so pH depends upon the dissociated ions.

Definition of pH

An evaluation of how basic a substance or solution is its pH is determined. pH is measured on a scale from 0 to 14. A pH value of 7 is considered to be neutral on this scale, which implies it is neither acidic nor basic. If the pH value is less than 7, it is considered to be acidic and if the pH value is greater than 7, it is considered to be basic.

pH < 7 for NH₃ and HClO₄ since the acid is strong acid and the base is weak base.

The pH value for NaOH and Benzoic acid is pH > 7, since the base is strong base and acid is a weak acid .

pH = 7 for HBr and KOH since both are strong acid and strong base

pH < 7 or pH > 7 since both are neutral.

Learn more about acids and bases from the given link given below.

brainly.com/question/28382743

#SPJ4

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1) Chemical reactions produce new substances

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2) The symbol, Δ in a chemical reaction means that heat of supplied to the reaction.

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7 0
3 years ago
Read 2 more answers
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
RideAnS [48]

The mass of melted gold to release the energy would be  3, 688. 8 Kg

<h3>How to determine the mass</h3>

We have quantity of energy is;

Q = n × HF

n = number of moles

HF = heat of fusion

Let's find number of moles

235.0 = n × 12.550

number of moles = \frac{235}{12. 550} = 18. 725 moles

Note that molar mass of Gold is 197g/ mol

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Mass = 18. 725 × 197

Mass = 3, 688. 8 Kg

Thus, the mass of melted gold to release the energy would be  3, 688. 8 Kg

Learn more about molar heat of fusion here:

brainly.com/question/15634085

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6 0
1 year ago
Which of the following statements are true regarding the remainder of the experiment if the scientist wants to use the combined
Serga [27]
The answer will be C
3 0
2 years ago
Donald needs to produce 5000 milliliters of 32% alcohol solution. At his disposal he has 40% alcohol solution and 20% alcohol so
PolarNik [594]

Answer:

The answer to your question is 3 L of solution 40% and 2 L of solution 20%

Explanation:

Data

Final volume = Vf = 5000 ml = 5 L

Final concentration = Cf = 32%

Concentration 1 = C1 = 40%

Concentration 2 = C2 = 20%

Volume 1 = x

Volume 2 = 5 - x

Process

1.- Write an equation to solve this problem

     VfCf = C1V1 + C2V2

2.- Substitution

    32(5) = 40x + 20(5 - x)

3.- Solve for x

     160 = 40x + 100 - 20x

     160 - 100 = 40x - 20x

               60 = 20x

               60/20 = x

               x = 3

     Then, Volume 1 = 3 L

4.- Find Volume 2

     Volume 2 = 5 - 3

     Volume 2 = 2 L

8 0
3 years ago
What are the two key ingredeints that help science move forward?
IgorC [24]

Answer:

science needs both ideas the hypothesis and facts the quantitative results to move forward

Explanation:

the two primary features of a scientific hypothesis are falsifiability and testability which are reflected in an If…then statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation

3 0
3 years ago
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