1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
umka2103 [35]
3 years ago
12

What the effect of temperature on Molarity, Molality ,Normality ? Explain.

Chemistry
1 answer:
mr Goodwill [35]3 years ago
8 0

Explanation:

Molality is the number of moles present in kilogram of solution. Mathematically, expression for molality is as follows.

      Molality = \frac{\text{no. of moles}}{\text{mass in kg}}  

As we increase the temperature of a solution then there occurs no change in its mass as well as no change in its number of moles. As a result, there will occur no change in molality of the solution.

Molarity is the number of moles present in liter of solution. So, with change in temperature there occurs change in volume of the solution. Hence, molarity will also change.  

Normality is no. of gram equivalents per liter of solution. As normality is also dependent on volume and when there occurs a change in temperature then volume of solution also changes. As a result, normality will also change with change in temperature.

You might be interested in
Which of the following alcohols is used antifreeze?
bogdanovich [222]

Answer:

Ethylene glycol

3 0
3 years ago
What sample size (grams) of Na3PO4 (FW 164.00) known to be 50.00% pure should be used to consume exactly 40.00 mL of 0.1000 M HC
Mkey [24]

Answer:

0.109 g.

Explanation:

Equation of the reaction:

Na3PO4 + 3HCl --> 3NaCl + H3PO4

Number of moles of HCl = molar concentration × volume

= 0.1 × 0.04

= 0.004 mol.

By stoichiometry, 1 mole of Na3PO4 neutralises 3 moles of HCl. Therefore, number of moles of Na3PO4 = 0.004/3

= 0.0013 mol

Mass of Na3PO4 = molar mass × number of moles

= 0.0013 × 164

= 0.219 g

Since 50% of Na3PO4 was present in the sample. Let 100 g be the total mass of the substance

= 0.219 × 50 g/100 g

= 0.109 g.

3 0
4 years ago
Which equation best describes the net changes based upon the observation that solid silver nitrate and solid potassium chloride
stealth61 [152]

Answer:

The correct option is: AgNO₃(aq) + KCl(aq) = AgCl(s) + KNO₃(aq)  

Explanation:

Precipitation reaction is a chemical reaction that involves reaction between <em>two soluble salts to give an insoluble salt.</em> This <u>insoluble salt exists as a solid</u> and settles down.

Therefore, the solid formed in a precipitation reaction is known as the precipitate.  

As the solid silver nitrate (AgNO₃) and solid potassium chloride (KCl) are <u>soluble in water</u>, therefore, their aqueous solutions are represented as AgNO₃(aq) and KCl(aq), respectively.

The precipitation reaction of AgNO₃(aq) and KCl(aq) gives an <u>insoluble salt, silver chloride (AgCl) and a soluble salt, potassium nitrate (KNO₃).</u>

The insoluble salt, <u>AgCl is called the precipitate</u> and is represented as AgCl(s). Whereas, the <u>soluble salt</u>, KNO₃ is represented as KNO₃ (aq).

<u>Therefore, the chemical equation for this precipitation reaction is:</u>

AgNO₃(aq) + KCl(aq) → AgCl(s) + KNO₃(aq)

6 0
3 years ago
A 6.50x10^-5 m solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15 cm cell at a wave
mihalych1998 [28]
For this problem, we use the Beer Lambert's Law. Its usual equation is:

A = ∈LC
where
A is the absorbance
∈ is the molar absorptivity
L is the path length
C is the concentration of the sample solution

As you notice, we only have to find the absorbance. But since we are not given with the molar absorptivity, we will have to use the modified equation that relates % transmittance to absorbance:

A = 2 - log(%T)
A = 2 - log(27.3)
A = 0.5638
7 0
3 years ago
According to the law of multiple proportions, when water forms, the mass ratio of hydrogen to oxygen is variable.
Eddi Din [679]

Answer & Explanation:

The law of multiple proportion states that two elements A and B can react with each other to form multiple compounds while one of the two elements remain fixed.

For Example

Hydrogen reacts with oxygen to form:

Water (H2O)

Hydrogen peroxide (H2O2)

4 0
3 years ago
Other questions:
  • Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2
    6·1 answer
  • A rigid stainless steel chamber contains 180 Torr of methane, CH 4 , and excess oxygen, O 2 , at 160.0 °C. A spark is ignited in
    11·1 answer
  • At most, how many covalent bonds can a phosphorous atom form? <br><br>(A) 1<br>(B2<br>(C)3<br>(D)4 ​
    8·1 answer
  • C12H22O11 + 6O2 à (Heat) + _________ + _________ + _________
    8·1 answer
  • Give two examples of how our society uses isotopes
    7·1 answer
  • A long term conscious effort to promote or prevent social change.
    11·1 answer
  • what does NaBr + Ca(OH)2 -&gt; CaBr2 + NaOH make, what rection for an example rust. is it aa chemical reaction? please reply asa
    15·2 answers
  • Sodium + oxygen<br> What colour is the flame produces
    5·2 answers
  • The density of a particular titanium alloy is 5.77 g/cm? What is the density in
    15·1 answer
  • What sign of chemical change occurs during chemiluminesence?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!