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artcher [175]
4 years ago
9

An acidic solution could have a pH of A) 14 B) 10 C) 3 D) 7

Chemistry
1 answer:
Alenkinab [10]4 years ago
8 0

Answer:

Option (C) 3

Explanation:

The pH scale is a scale that ranges from 0 to 14. The pH reading has various notifications. These notifications are as follow:

1. If the pH reads between 0 and 6, then the solution is acidic.

2. If the pH reads 7, then the solution is neutral.

3. If the pH reads between 8 and 14, then the solution is basic.

With the above information, option C is the correct answer to the question.

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A19.0g sample of brass, which has a specific heat capacity of 0.375·J*g^−1°C−, is dropped into an insulated container containing
djverab [1.8K]

Answer:

The final temperature is 20.3 °C

Explanation:

Considering that:-

Heat gain by water = Heat lost by brass

Thus,  

m_{water}\times C_{water}\times (T_f-T_i)=-m_{brass}\times C_{brass}\times (T_f-T_i)

Where, negative sign signifies heat loss

Or,  

m_{water}\times C_{water}\times (T_f-T_i)=m_{brass}\times C_{brass}\times (T_i-T_f)

For water:

Mass = 300.0 g

Initial temperature = 20.0 °C

Specific heat of water = 4.184 J/g°C

For brass:

Mass = 19.0 g

Initial temperature = 81.7 °C

Specific heat of water = 0.375 J/g°C

So,  

300.0\times 4.184\times (T_f-20.0)=19.0\times 0.375\times (81.7-T_f)

1255.2T_f-25104=582.1125-7.125T_f

1262.325T_f=25686.1125

T_f = 20.3\ ^0C

<u>Hence, the final temperature is 20.3 °C</u>

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