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Nana76
2 months ago
5

CAN SOMEONE PLEASEEEE DO THIS!!! ASAP ILL GUVE AS MANY POINTS AS I CAN Laboratory Techniques Lab Report

Chemistry
1 answer:
Tems11 [2.7K]2 months ago
7 0

Response:

What kind of assistance do you require?

Clarification:

You might be interested in
5 grams of NaHCO3 was added to 50 cm3 of 1.5 mol dm-3 hydrochloric acid, causing the temperature to decrease by 6.8 K. What is t
Anarel [2989]

The balanced chemical equation for the neutralization of HCl with NaHCO_{3} is:

HCl (aq) + NaHCO_{3}(aq)--> NaCl (aq) + H_{2}O(l)+CO_{2} (g)

Given weight of NaHCO_{3} = 5g

Moles of NaHCO_{3} = 5 g *\frac{1 mol}{84 g} = 0.05952 mol NaHCO_{3}

Volume of HCl solution = 50 cm^{3} * \frac{1 mL}{1cm^{3}} = 50 mL

Assuming the density of the solution is 1.0 g/mL

Mass of HCl solution = 50 g

Overall mass of the solution = 50 g + 5 g = 55 g

To find the heat of neutralization, we calculate:

Q = m C ΔT

where m equals the mass of the solution = 55 g

C represents the specific heat capacity of the solution = 4.184\frac{J}{g. ^{0}C}

ΔT signifies the temperature change = 6.8 K = (6.8 - 273) C = -266.2^{0}C

Q = 55 g * 4.184 \frac{J}{g. K}(6.8K) = 1565 J

The enthalpy of neutralization per mole of NaHCO_{3}

= \frac{1565J}{0.05952 mol} = 26294 \frac{J}{mol}*\frac{1 kJ}{1000J} =26.294kJ/mol

3 0
4 months ago
Read 2 more answers
For each reaction, identify the element that gets reduced and the element that gets oxidized. 2 AgCl + Zn ⟶ 2 Ag + ZnCl 2 2AgCl+
lorasvet [2795]

Answer:

Explanation:

Oxidation:

Oxidation refers to the process where electrons are lost, resulting in an increase in the oxidation state of an atom of an element.

Reduction:

Reduction is characterized by the acquisition of electrons, leading to a decrease in the oxidation number.

Oxidizing agents:

Oxidizing agents facilitate oxidation of other substances while they themselves undergo reduction.

Reducing agents:

Reducing agents cause the other element to be reduced, while they are oxidized in the process.

Examine the following reaction:

2AgCl + Zn  → 2Ag + ZnCl₂

In this instance, the oxidation state of Zn on the left is 0 and rises to +2 on the right, indicating it is oxidized, while the oxidation state of Ag drops from +1 on the left to 0 on the right, showing it is reduced.

4NH₃  +  3O₂   →   2N₂ +  6H₂O

For this reaction, nitrogen's oxidation state shifts from -3 on the left to 0 on the right, signifying it is oxidized, whereas oxygen decreases from 0 to -2, indicating it gets reduced.

Fe₂O₃ +  2Al  →   Al₂O₃ +  2Fe

Here, the oxidation state of iron reduces from +3 on the left to 0 on the right, meaning it is reduced, while aluminum shifts from 0 to +3, indicating it is oxidized.

4 0
2 months ago
Which statement is TRUE regarding the macroscopic and
lions [2927]

Answer:

Chemists observe phenomena on a macroscopic level which informs their understanding of microscopic aspects.

Explanation:

Many critical chemical insights arise from macroscopic observations because most scientific instruments currently cannot directly evidence microscopic events. Data gathered from these larger-scale observations can yield valuable insights into the nature of specific microscopic interactions.

This is particularly true in atomic structure studies. The majority of evidence that contributed to our understanding of atomic structure was obtained from macroscopic observations and subsequently provided crucial information regarding the atom's microscopic configuration.

7 0
3 months ago
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