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3 years ago

How does litmus indicator work

1 answer:

6 0

Answer:

The substance which responds to the change in the concentration of the hydronium ions in solution by changing its color is known as an indicator.

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Write the balanced chemical reaction for the combustion of methane.

patriot [66]

During a combustion reaction, carbon dioxide and water are produced from an hydrocarbon and oxygen.

In this case the hydrocarbon is methane.

The combustion of methane is given by the following chemical equation:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

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1 year ago

Pure water has a pH of 7. Pure water _______.

raketka [301]

Answer:

The concentration of Hydrogen Cation is:

Pure water is<u> NEUTRAL</u>

Explanation:

pH = It is negative logarithm of activity of Hydrogen ions.

$pH = - log(a_{[H^{+}]})$

Activity = concentration for dilute solutions

There are three types of solution based on pH:

1. Acidic solution : Those solution which have pH between 0 to 7 or less than 7 are acidic in nature . They turns blue litmus red.They contain more H+ ions than OH- ions

2. Basic : Those solution which have pH value greater that 7 of between 7 to 14 are basic in nature . They turn red litmus blue.They contain more OH- ions then H+ ions

3 . Neutral : Those solution which have pH = 7 are neutral . They are neither acidic nor basic in nature .They have equa;l concentration of H+ and OH- ions in the solution.

The given water has pH = 7 .This means it is neutral and has low H+ ion concentration in solution. The H+ ion are :

$10^{-7}$ M in water.

OH- =

$10^{-7}$ M in water

So overall neutral

8 0

3 years ago

In acidic solution, the breakdown of sucrose into glucose and fructose has this rate law: Rate = k[H⁺][sucrose]. The initial rat

yKpoI14uk [10]

In an acidic solution, the rate change if Sucrose is changed to 2.5 M will be Rate = k[H⁺][2.51M] as the initial rate of sucrose breakdown is measured in a solution that is 0.01 M H⁺.

<h3>What is the breakdown of sucrose?</h3>

Sucrose is a type of sugar that is made by adding fructose and glucose or the breakdown of fructose will be in the form of glucose and fructose always at different levels of concentration.

In the given acidic solution if the concentration of sucrose changes from 0.01 to 2.5 then both have to add to give the total rate of change in the given reaction and it will be 2.51 M.

Therefore, Rate = k[H⁺][2.51M] as the initial rate of sucrose breakdown is measured in a solution that is 0.01 M H⁺for an acidic solution, the rate change if Sucrose is changed to 2.5 M.

Learn more about the breakdown of sucrose, here:

brainly.com/question/28297399

#SPJ4

6 0

2 years ago

Unemployment rate varies according to such factors as

sineoko [7]

I’m pretty sure the answer is A.

3 0

3 years ago

In an open system, the vapor pressure is _____ the outside air pressure.

Jlenok [28]