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3 years ago

What happens in a neutralization reaction?

Chemistry

1 answer:

mina [271]3 years ago

7 0

Answer:

Answer is letter B

Explanation:

The first one is wrong because acids release H+, not bases.

The third one is wrong because the pH is exactly 7, not greater.

The last one is wrong because it is vague and does not fit a neutralization reaction.

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What volume of 1.75 M hydrochloric acid (HCl aq) must be diluted with water to prepare 0.500 L of 0.250 M hydrochloric acid?

Airida [17]

Answer:

$V_1=0.0714L$

Explanation:

Hello there!

In this case, since we need to dilute the 1.75-M HCl, and the total number of moles remain unchanged, we can write:

$n_1=n_2$

And in terms of volume and concentration:

$C_1V_1=C_2V_2$

Thus, we can solve for the volume of the concentrated HCl as shown below:

$V_1=\frac{C_2V_2}{C_1}$

Therefore, we plug in the data to get:

$V_1=\frac{0.250M*0.500L}{1.75 M}\\\\V_1=0.0714L$

Best regards!

7 0

3 years ago

Nitrogen gas at 300 k and 200 kpa is throttled adiabatically to a pressure of 100 kpa if the change in kinetic energy is negligb

erastovalidia [21]

Answer:

The temperature of the Nitrogen after throttling is $T_2 = 300 \ K$

Explanation:

From the question we are told that

The temperature is $T_1 = 300 \ K$

The pressure is $P = 200 \ kPa = 200 * 10^{3} \ Pa$

The pressure after being $P_1 = 100 \ kPa = 100 * 10^{3} \ Pa$

Generally from the first law of thermodynamics we have that

$Q - W = \Delta U + \Delta K$

Here $\Delta U$ is the change internal energy which is mathematically represented as

$\Delta U = C_p (T_2 - T_1)$

Here $C_p$ is the specific heat of the gas at constant pressure

$\Delta K$ is the change kinetic energy which is negligible

Q is the thermal energy which is Zero for an adiabatic process

W is the work done and the value is zero given that the gas was throttled adiabatically

$0= \Delta U +0$

=> $\Delta U = 0$

=> $(T_2 - 300) = 0$

=> $T_2 = 300 \ K$

3 0

3 years ago

Please help me! And if can explain me the work I would really appreciate it! Thank you!! ❤️

IgorC [24]

Answer: The answer is D

Explanation:

So there is 2K + 2H2O --> 2KOH + 1H2

2Potassium + 2Water ---> 2Potassium Hydroxide + 1Dihyrogen

7 0

3 years ago

You and a friend each hold one end of a long spring toy and shake it back and forth to make waves. What is the medium fot these

user100 [1]

C. the spring brainliest pls

8 0

2 years ago

The region in which an electron is likely to be found is known as a(n) ____________.

Zinaida [17]

Answer:

orbital

Explanation:

electrons are found in an orbital

3 0

3 years ago