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Evgesh-ka [11]
3 years ago
5

What is an acid base indicator​

Chemistry
1 answer:
zhenek [66]3 years ago
3 0

Answer:

Acid-base indicators are generally weak proteolytic that change color in solution according to the pH. The acid-base equilibrium of a weak acid type of indicator (HI) in water can be represented as. [I] The acid, HI, and the conjugate base, I−, have different colors. The equilibrium expression for this process is.

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MA_775_DIABLO [31]
The answer is D. At least that's what I think.
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A 3.50 amp power supply is used to deposit chromium from a solution of CrCl3. How long will it take to deposit 100.0 grams of ch
Norma-Jean [14]

Explanation:

The given data is as follows.

   Current (I) = 3.50 amp,        Mass deposited = 100.0 g

  Molar mass of Cr = 52 g

It is known that 1 faraday of electricity will deposit 1 mole of chromium. As 1 faraday means 96500 C and 1 mole of Cr means 52 g.

Therefore, 100 g of Cr will be deposited by "z" grams of electricity.

                z \times 52 g = 96500 \times 100 g

                         z = \frac{96500 \times 100 g}{52 g}

                            = 185576.9 C

As we know that, Q = I × t

Hence, putting the given values into the above equation as follows.

                      Q = I × t

           185576.9 C = 3.50 amp \times t  

                      t = 53021.9 sec

Thus, we can conclude that 100 g of Cr will be deposited in 53021.9 sec.

3 0
3 years ago
Put 30,000,000,000 into scientific notation
Neko [114]
Your number in decimal form is
3,000,000
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To get to standard scientific notation, we move the decimal point so there is only one non-zero digit in front of the decimal point.
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3.000,000
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The trailing zeroes are not significant, so
3.000,000
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We moved the decimal point six places, so the exponent is
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We moved the decimal point to the left, so the exponent is positive.
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Answer:

the answer is A

Explanation:

physical changes does not change the property of matter.

7 0
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