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Marysya12 [62]
3 years ago
11

Which property of a substance can be determined using a pH indicator?

Physics
2 answers:
Ann [662]3 years ago
8 0

Answer:

a) Acidity

<h3><u>More</u><u> </u><u>to</u><u> </u><u>know</u><u> </u></h3>

  • The pH scale is a mixture of indicator which on dissolving indicate whether the substances is acidic in nature or basic .

  • The value between 1 to 7 is acidic

  • The value between 7 to 14 is basic

  • The value 7 is neutral

  • Acids are sour in taste and turn blue litmus ( indicator) to red

  • Base are bitter in taste and turn red litmus to blue.

  • Salts are neutral and obtain by the reaction between acid and bases.
Gekata [30.6K]3 years ago
3 0

Answer:

Acidity

Explanation:

pH measures how acidic or basic a substance is.

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A form of erosion in which particles of sand or dust rub across the surface of rocks.
gayaneshka [121]
The answer is B) Abrasion.
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3 years ago
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How many miles did a plane travel if it flew 455 miles per hour in 3 hours? What formula did you have to use?
Alik [6]

Answer:

1,365 miles

Explanation:

i multiplied 455 x 3 because it traveled 455 miles an hour for three hours.

4 0
3 years ago
The length of the minute hand of the clock is 14cm. Calculate the speed with which the tip of the minute hand moves
Molodets [167]

Speed of the tip of the minute hand=V=0.0244 cm/s

Explanation:

The angular velocity of the minute hand is given by

\omega= \frac{2\pi}{T}

T= time period of the minute hand=60 min=3600 s

so ω= 2 π/3600 rad/s

Now linear velocity v= r ω

r= radius of minute hand=14 cm

so v= 14 (2 π/3600)

V=0.0244 cm/s

8 0
3 years ago
A student tests the acidity of nitric acid (HNO3) by dissolving a sample of HNO3 in a solution of liquid methane. He then uses a
DerKrebs [107]
Sorry I didn't see this before...
Okay, I see two major problems with this student's experiment:

1) Nitric acid Won't Dissolve in Methane
Nitric acid is what's called a mineral acid. That means it is inorganic (it doesn't contain carbon) and dissolves in water.
Methane is an organic molecule (it contains carbon). It literally cannot dissolve nitric acid. Here's why:
For nitric acid (HNO3) to dissolve into a solvent, that solvent must be polar. It must have a charge to pull the positively charged Hydrogen off of the Oxygen. Methane has no charge, since its carbon and hydrogens have nearly perfect covalent bonds. Thus it cannot dissolve nitric acid. There will be no solution. That leads to the next problem:

2) He's Not actually Measuring a Solution
He's picking up the pH of the pure nitric acid. Since it didn't dissolve, what's left isn't a solution—it's like mixing oil and water. He has groups of methane and groups of nitric acid. Since methane is perfectly neutral (neither acid nor base), the electronic instrument is only picking up the extremely acidic nitric acid. There's no point to what he's doing.

Does that help?
8 0
3 years ago
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A parked car's horn (belonging to a musician) emits a concert A of frequency 440 on a day when the speed of sound is 342 m/s. Yo
julsineya [31]

Answer:

19.08 m/s

Explanation:

f = actual frequency emitted by the parked car's horn = 440 Hz

V = speed of sound = 342 m/s

f' = frequency of the horn observed by you = 466 Hz

v = speed of your car moving towards the parked car = ?

frequency of the horn observed by you is given as

f' = \frac{Vf}{V - v}

466 = \frac{(342)(440)}{342 - v}

v = 19.08 m/s

3 0
3 years ago
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