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myrzilka
3 months ago
10

If 4.35 g of phosphoric acid are added to 5.25g of KOH, what is the percent yield of the reaction if only 3.15g of potassium pho

sphate is isolated?
Chemistry
1 answer:
lorasvet [2.7K]3 months ago
5 0
We are provided with
4.35 g of phosphoric acid
5.25 g of KOH
3.15 g of K3PO4 produced

The reaction formula is
H3PO4 + 3KOH => K3PO4 + 3H2O

Initially, convert the given masses into moles.
Then, identify the limiting reactant. Afterward, calculate the maximum K3PO4 that can be generated from the limiting reactant.
Finally, compute the percent yield by dividing the actual yield by the theoretical yield.
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Predict what will observe in below mention experiment.
KiRa [2933]

When analyzing the experiments: Rock candy formation occurs when excess sugar dissolves in hot water followed by crystallization. A student aims to create two rock candy batches. He discovers a box of "cane sugar" in the pantry. For batch A, he dissolves sugar in 500 mL of hot water at 70 degrees Celsius, continuing until no more dissolves. He then allows this solution to cool to room temperature. For batch B, he dissolves sugar in 500 mL of room temperature water until saturation, leaving it to sit.

a. It is probable that batch A will yield more rock candy.

b. It is probable that batch A will yield less rock candy.

c. It is likely that neither batch will yield any rock candy.

d. Additional information is needed to determine which batch is more likely to produce rock candy.

Answer: The correct option is A

Explanation:

Batch A should result in greater rock candy production since it utilizes hot water for dissolving sugar, while batch B will produce less due to the cooler temperature impacting solubility.

Hot water is essential for dissolving sugar more effectively than at room temperature. Sugar will dissolve until all available space for sugar molecules is filled.

Thus, the accurate response is Option A.

6 0
3 months ago
(g) On the graph in part (d) , carefully draw a curve that shows the results of the second titration, in which the student titra
Tems11 [2777]

Response:

This is my understanding.

Explanation:

(g) Titration curves

While I can't create two curves on a single graph, I can depict them separately for clarity.

In part (d), the graph indicated an equivalence point at 20 mL.

For the second titration, since the NaOH concentration is doubled, the volume to reach the equivalence point will be halved — 10 mL.

Below are the two titration curves.

(h) Evidence of reaction

Both HCl and NaOH are colorless solutions.

There is no gas released or precipitate formed during their reaction.

It’s likely the student observed that the Erlenmeyer flask heated up, indicating a chemical change.

4 0
4 months ago
Classify these compounds as acid, base, salt, or other.? 1. ch3oh 3. hno3 5. nabr
KiRa [2933]
<span> </span><span>1. Other (Alcohol)
3. Acidic
5. Salt

</span>
5 0
3 months ago
Read 2 more answers
Why does 5060 have three significant figures?
Anarel [2989]

5060 has three significant figures: Below is the clarification

Explanation:

Significant figures

Significant figures (also referred to as significant digits and decimal places) in a number are those digits that carry substantial meaning.

These include all digits except: leading zeros.

Guidelines for determining significant figures

1. All non-zero digits are counted as significant. For instance, the number 23 has two significant figures.

2. Zeros located between two non-zero digits are significant; for example, 202.1201 contains seven significant figures.

3. Zeros preceding the significant figures are not significant. For example,.000021 has two significant figures, with zeros being non-contributory.

4. Zeros following the significant figures are significant.

This explains why the number 5060 has three significant figures.

3 0
3 months ago
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