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3 years ago

Which solution has the lowest freezing point?

1 answer:

5 0

The solution of Ba(OH)2 will have the lowest freezing point. This is because it dissociates into 3 ions, one Ba and 2 OH, which is more than any of the others. Freezing point depression is a colligitive property of water that depends, in part, on the number of ions.

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Calculate the pH at of a 0.10 Msolution of anilinium chloride . Note that aniline is a weak base with a of . Round your answer t

notsponge [240]

The question is incomplete, here is the complete question:

Calculate the pH at of a 0.10 M solution of anilinium chloride $(C_6H_5NH_3Cl)$ . Note that aniline $(C6H5NH2)$ is a weak base with a $pK_b$ of 4.87. Round your answer to 1 decimal place.

Answer: The pH of the solution is 5.1

Explanation:

Anilinium chloride is the salt formed by the combination of a weak base (aniline) and a strong acid (HCl).

To calculate the pH of the solution, we use the equation:

$pH=7-\frac{1}{2}[pK_b+\log C]$

where,

$pK_b$ = negative logarithm of weak base which is aniline = 4.87

C = concentration of the salt = 0.10 M

Putting values in above equation, we get:

$pH=7-\frac{1}{2}[4.87+\log (0.10)]\\\\pH=5.06=5.1$

Hence, the pH of the solution is 5.1

8 0

3 years ago

Which is an example of making a quantitative observation?

lions [1.4K]

Measuring the surface of an oil painting and finding its dimensions 12 to be 12 inches

8 0

3 years ago

An ant carries a morsel of food 4.26 meters along a straight path to his nest. he then turns around and follows the path back to

SVEN [57.7K]

Answer: 0.00 meters

Solution:

Step 1: Define displacement DISPLACEMENT = a vector quantity that describes "linear or angular distance in a given direction between a body or point and a reference position."

Step 2: Understand the question

Assumption 1: Assume that when the ant moves 4.25 meters from its origin to its nest, it is moving in a positive direction (on a graph you would draw a line along the x-axis from its origin to +4.25).

Assumption 2: Assume that when the ant "turns around...back to the source of food", it is moving back in the negative direction (towards the origin).

Step 3: Analyze the question

What is the distance between where the ant originally started and where it ended its journey?

The ant started and ended its journey in the same place.

While it traveled a distance of 8.52 meters (2 * 4.26 = 8.52), it's displacement is actually 0.00 meters (4.26 + (-4.26) = 0.00)

Therefore, the answer is 0.00 meters

5 0

3 years ago

When iron reacts with oxygen what substance is produced?

zhannawk [14.2K]

It will produce iron oxide

8 0

4 years ago

The combustion of hydrogen and oxygen is commonly used to

posledela

Answer:

6.66 mol

Explanation:

(atm x L) ÷ (0.0821 x K)

(0.875 x 250) ÷ (0.0821 x 400)

=6.66108

5 0

3 years ago