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
pychu [463]
3 years ago
15

In an experiment, hydrochloric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was form

ed during the reaction. A cross drawn at the base of each flask became gradually invisible due the formation of this yellow precipitate. The time taken for the cross to become invisible was recorded. A partial record of the experiment is shown.
Experimental Record Flask Volume of

HCl Volume of

Sodium Thiosulfate Volume of

Water Time

1 10 mL 10 mL 40 mL 14 seconds

2 10 mL 20 mL 30 mL

3 10 mL 30 mL 20 mL

4 10 mL 40 mL 10 mL


Based on your knowledge of factors that affect the rates of chemical reactions, predict the trend in the last column of the experimental record. Use complete sentences to explain the trend you predicted. You do not have to determine exact values for time; just describe the trend you would expect (increase or decrease) and why it occurs
Chemistry
1 answer:
morpeh [17]3 years ago
5 0

Answer:

The time taken for the cross to become invisible decreases.

Explanation:

We know that one of the factors affecting the rate of reaction is the concentration of reactants. From the collision theory, we know that the higher the concentration of reactants, the greater the possibility of effective collision between reactants leading ultimately to an increase in the rate of reaction. Increase in the rate of reaction implies that the reaction takes a shorter time to reach completion.

In the case of the reaction shown in the question, the point when the reaction is completed is observed by the time take for the cross mark to become invisible. If we look at the given data closely, we will notice that the volume of acid was held constant, the volume of thiosulphate was increased gradually while the volume of water was decreased accordingly. This implies that the concentration of the reactants was increased. Decreasing the volume of water increases reactant concentration.

As explained above, increase in reactant concentration increases the rate of reaction. Hence, the rate of reaction of the acid and thiosulphate increases as reactant concentration increases and the cross mark becomes invisible faster. This implies that in the last column for time taken for the cross to become invisible, the values of time decreases steadily as concentration of reactants increases.

You might be interested in
The unique odors and flavors of many fruits are primarily due to small quantities of a certain class of organic compounds. The e
SpyIntel [72]
Based on the diagram shown, a numerical setup for calculating the gram-formula mass for reactant 1 would be :
6(1) + 2(12) + 16

Hope this helps
5 0
2 years ago
Al + Fe2O3 → Al2O3 + Fe (Need to balance equation)
andriy [413]
20.7 g of Fe can be produced with 10.0g of Al

6 0
3 years ago
What color or colors of light are transmitted by a piece of yellow glass?
Artyom0805 [142]

Answer:

So combining blue with yellow light is like combining blue light with red and green light. The result of combining these three primary colors of light is to produce white light.

Explanation:

8 0
2 years ago
The number of positive charges in the nucleus of an atom is equal to: its mass number its atomic number Avogadro's number its at
makkiz [27]

Answer:

its atomic number

Explanation:

the mass number/atomic mass is how many protons and neutrons are combined in an element. But, the atomic number is just protons.

6 0
3 years ago
A rigid, 2.50 L bottle contains 0.458 mol He. The pressure of the gas inside the bottle is 1.83 atm. If 0.713 mol Ar is added to
Alex17521 [72]

137 K

The volume is constant, so you can use <em>Gay-Lussac’s Pressure-Temperature Law </em>to calculate the new temperature (you don’t have to use the number of moles).

P1/T1 = P2/T2

Solve for T2: T2= T1 x P2/P1

P1 = 1.83 atm; T1 = 122 K

P2 = 2.05 atm; T2 = ?

∴ T2 = 122 K x (2.05 atm)/(1.83 atm) = 137 K

This result makes sense. Temperature is directly proportional to pressure. You increased the pressure by about 10 %, so the temperature increased by about 10 %.

3 0
3 years ago
Read 2 more answers
Other questions:
  • With solutions of strong acids and strong bases, the word strong refer to ____. (1 point) normality molarity solubility degree o
    10·2 answers
  • Sedimentation increases with an increase in land used for agriculture.
    9·1 answer
  • During boiling, bubbles appear in the liquid water. In the boxes below represent the
    9·1 answer
  • Explain how the effects of nuclear charge and the increasing number of core electrons in an atom oppose each other.
    10·1 answer
  • Help asap!!
    12·1 answer
  • 6th grade science i will give brainliest
    12·1 answer
  • No link need right answer <br><br> science no chemistry
    8·2 answers
  • If two people attempt the same maneuver, what determines the amount of force that each is required to exert?
    6·1 answer
  • The bathroom mirror has water droplets on it after a hot shower. choose the correct phase change. HELPP
    7·1 answer
  • What is the final temperature of a 2.50 L system when its volume is reduced to 1.75 L if the initial temperature was 298 K?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!