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Olin [163]
3 years ago
14

Three beakers contain clear, colorless liquids. One beaker contains pure water, another contains salt water, and another contain

s sugar water. How can you tell which beaker is which? (No tasting allowed!)

Chemistry
2 answers:
gladu [14]3 years ago
6 0
Pure water may be identified by its density: it will have the lowwest density of the three solutions, given that the solutes (salt and sugar) increase the density (this is the easiests and quickest way).

You can also measure the freezing points or boling points to identify the pure water because the solutes depress the freezing points and increase the boling points.

To differentiate sugar water and salt water, you can probe which one conducts electricity, because salt water is a conductor (given that it ionizes into Na+ and Cl-) but sugar water is not a conductor.
Anastaziya [24]3 years ago
4 0

To differentiate the three solutions in a beaker, the electrode circuit test and direct current source and the heating process are used

<h3>Further explanation</h3>

Electric current in an electrolyte solution is caused by the ions that move between the electrodes with one another. So these ions are the conductor of electricity.

Electrical conductivity can be interpreted as the ability of a conductor in this case an electrolyte solution to move an electric charge

Electrical conductivity indicates an easy measure of whether or not a solution conducts an electric current.

Based on the electrical conductivity, electrolytes can be grouped into strong electrolytes and weak electrolytes

Liquid substances can be grouped based on their electrical conductivity, namely electrolyte and non-electrolyte solutions.

The sign of the solution is an electrolyte can be used a test equipment consisting of a series of electrodes and a direct current source. If the light is on, the solution is an electrolyte solution

Some substances in the solid state cannot conduct electricity but in a liquid / solution state can conduct electricity.

examples of strong electrolyte solutions: HBr, NaCl

Example of a weak electrolyte solution: CH₃COOH

Examples of non-electrolyte solutions:

Sugar Solution (C₁₂H₂₂O₁₁), Ethanol (C₂H₅OH), Urea (CO(NH₂)₂)

Of the three beaker water which is an electrolyte solution is a salt solution (NaCl), while water and sugar are not an electrolyte solution, so that when tested in a series of electrodes and direct current sources ,they cannot turn on the lights

Furthermore, to distinguish between water and sugar solution, the heating process can be carried out and the boiling point measured with a thermometer.

The boiling point of the sugar solution will be greater than water because there are sugar solutes

<h3>Learn more</h3>

colligative properties

brainly.com/question/8567736

Raoult's law

brainly.com/question/10165688

The vapor pressure of benzene

brainly.com/question/11102916

The freezing point of a solution

brainly.com/question/8564755

brainly.com/question/4593922

brainly.com/question/1196173

Keywords: Boiling Point, electrolyte solution

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Exactly 313.5 J will raise the temperature of 10.0 g of a metal from 25.0 C to 60.0 C. What is the specific heat of the metal?
torisob [31]
From the equation Q = m\cdot c_e\cdot \Delta T we can clear specific heat:

c_e = \frac{Q}{m\cdot \Delta T}\ \to\ c_e = \frac{313.5\ J}{10\ g\cdot (60 - 25)^\circ C} = \bf 0.896\frac{J}{g\cdot ^\circ C}
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3) What are the three types of sedimentary rocks?
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Answer:

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Carbon dioxide is treated with coke.​
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A 1.555-g sample of baking soda decomposes with heat to produce 0.991 g Na2CO3. Refer to Example Exercise 14.l and show the calc
Sunny_sXe [5.5K]

Answer:

a) 101%

b)59.7%

Explanation:

The equation for the thermal decomposition of baking soda is shown;

2NaHCO3 → Na2CO3 + H2O + CO2

Number of moles of baking soda= mass/molar mass= 1.555g/84.007 g/mol = 0.0185 moles

From the reaction equation;

2 moles of baking soda yields 1 mole of sodium carbonate

0.0185 moles of baking soda will yield = 0.0185 moles ×1 /2 = 9.25 ×10^-3 moles of sodium carbonate.

Therefore, mass of sodium carbonate= 9.25 ×10^-3 moles × 106gmol-1= 0.9805 g of sodium carbonate. This is the theoretical yield of sodium carbonate.

%yield = actual yield/theoretical yield ×100

% yield = 0.991/0.9805 ×100

%yield = 101%

Since ;

2NaHCO3 → Na2CO3 + H2O + CO2

And H2O + CO2 ---> H2CO3

Hence I can write, 2NaHCO3 → Na2CO3 + H2CO3

Molar mass of H2CO3= 62.03 gmol-1

Molar mass of baking soda= 84 gmol-1

Therefore, mass of baking soda=

0.325/62.03 × 2 × 84 = 0.88 g of NaHCO3

% of NaHCO3= 0.88/1.473 × 100 = 59.7%

7 0
3 years ago
Which of the following elements has the strongest ionization energy: Mg or Cl? Define ionization
Mila [183]

Answer:

Cl

Explanation:

The element Cl will have the strongest ionization energy from the given choices. Most non-metals have higher ionization energy compared to metals.

Ionization energy is the energy required to remove the most loosely held electron from the gaseous phase of an atom.

  • As you go from left to right on the periodic table, it increases progressive
  • From top to bottom, the ionization energy reduces significantly.
  • The attractive force between the protons in the nucleus and the electrons plays a very important role.
  • In metals, they have very large atomic radius, the attractive force on the outer electrons is very weak.
  • This is not the case in non-metals
5 0
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