In an experiment, 0.8gm of magnesium of powder were reacted with excess dilute sulphuric acid at 25⁰C . The time for the reaction to come to...

      

In an experiment, 0.8gm of magnesium of powder were reacted with excess dilute
sulphuric acid at 25⁰C . The time for the reaction to come to completion was recorded.
The experiment was repeated at 40⁰C. In which experiment was the time taken shorter?
Explain your answer.

  

Answers

---

Experiment II. At a high temperature the particles have more energy, hence rate of high
energy collisions increase.

---

Kavungya answered the question on June 24, 2019 at 06:06

Next: It was confirmed that magnesium sulphate was present in the tap water (i) What type of hardness was present in the water? (ii) Explain how the hardness...
Previous: At 298K and 1 atmosphere, graphite changes into diamond according to the equation: C (graphite) ? C(diamond); ?=2.9 kJmo^-1 In the space provided, sketch a simple energy...

View More Chemistry Questions and Answers | Return to Questions Index

Learn High School English on YouTube

Related Questions

---

• It was confirmed that magnesium sulphate was present in the tap water (i) What type of hardness was present in the water? (ii) Explain how the hardness...(Solved)
  

  It was confirmed that magnesium sulphate was present in the tap water
  (i) What type of hardness was present in the water?
  (ii) Explain how the hardness can be removed

  Date posted: June 24, 2019.  Answers (1)

• (i) In the space provided sketch a labeled diagram to show how hydrogen chloride gas can be prepared and collected in the laboratory using sodium Chloride and...(Solved)
  

  (i) In the space provided sketch a labeled diagram to show how hydrogen
  chloride gas can be prepared and collected in the laboratory using sodium
  Chloride and concentrated sulphuric acid ( the gas need not be dry)
  (ii) Write an equation for the reaction that takes place
  (iii) Name one drying agent for hydrogen chloride
  (vi) State and explain the observation that would be made when hydrogen
  chloride gas is bubbled through a solution of lead (II) nitrate
  (v) Concentrated hydrochloric acid is used for removing oxide from metal surfaces (
  picking). Explain why concentration nitric acid cannot be used for the purpose.

  Date posted: June 24, 2019.  Answers (1)

• The curves below were obtained when two equal volumes of hydrogen peroxide of the same concentration were allowed to decompose separately. In one case, manganese (IV) oxide...(Solved)
  

  The curves below were obtained when two equal volumes of hydrogen peroxide of the
  same concentration were allowed to decompose separately. In one case, manganese (IV)
  oxide was added to the hydrogen peroxide
  
  Which curve represents the decomposition of hydrogen peroxide with manganese (IV)
  oxide? Explain

  Date posted: June 24, 2019.  Answers (1)

• A given volume of ozone, (O₃) diffused from a certain apparatus in 96 seconds. Calculate the time taken by an equal volume of carbon dioxide (CO₂)...(Solved)
  

  A given volume of ozone, (O₃) diffused from a certain apparatus in 96 seconds.
  Calculate the time taken by an equal volume of carbon dioxide (CO₂) to diffuse under
  the same conditions (O = 16.0, C = 12.0)

  Date posted: June 24, 2019.  Answers (1)

• 20.0cm³ of a solution containing 4 gm per litre of sodium hydroxide was neutralized by 8.0cm³ of dilute sulphuric acid. Calculate the concentration of sulphuric acid...(Solved)
  

  20.0cm³ of a solution containing 4 gm per litre of sodium hydroxide was neutralized
  by 8.0cm³ of dilute sulphuric acid. Calculate the concentration of sulphuric acid in
  moles per litre (Na = 23.0, O = 16.0, H = 1.0)

  Date posted: June 24, 2019.  Answers (1)

• Use the scheme below to answer the questions that follow (a) Identify the solid H J (b) State one commercial use of solid J(Solved)
  

  Use the scheme below to answer the questions that follow
  
  
  (a) Identify the solid
  H
  J
  (b) State one commercial use of solid J

  Date posted: June 24, 2019.  Answers (1)

• A hydrocarbon P was found to decolourise bromine water. On complete combustion of 2 moles of P, 6 moles of carbon dioxide and 6 moles of...(Solved)
  

  A hydrocarbon P was found to decolourise bromine water. On complete combustion of 2
  moles of P, 6 moles of carbon dioxide and 6 moles of water were formed
  (a) Write the structural formula of P
  (b) Give the name of P
  (c) Name one industrial source of P

  Date posted: June 24, 2019.  Answers (1)

• The information below relates to elements S,T,U and X. ( the letters do not represents the actual symbols of the elements. (i) T displaces X from an...(Solved)
  

  The information below relates to elements S,T,U and X. ( the letters do not represents the
  actual symbols of the elements.
  (i) T displaces X from an aqueous solution containing ions of X
  (ii) Hydrogen gas reduces heated oxide of S but does not reduce the heated oxide of X
  (iii) U liberates hydrogen gas from cold water but T does not
  (a) Write an equation for the reaction between T and the ions of X.
  Both T and X are in group II of the periodic Table)
  (b) Arrange the elements in order of their increasing reactivity

  Date posted: June 24, 2019.  Answers (1)

• When a current of 1.5 amperes was passed though a cell containing m³⁺ ions of a metal M for 15 minutes, the mass of the cathode...(Solved)
  

  When a current of 1.5 amperes was passed though a cell containing m³⁺ ions of a metal
  M for 15 minutes, the mass of the cathode increased by 0.26g.
  (1 Faraday = 96500 coulombs)
  (a) Calculate the quantity of electricity used
  (b) Determine the relative atomic mass of metal M

  Date posted: June 22, 2019.  Answers (1)

• The molecular formula of a hydrocarbon is C₆H₁₄. The hydrocarbon can be converted into two other hydrocarbons as shown by the equation below (i) Name and draw...(Solved)
  

  The molecular formula of a hydrocarbon is C₆H₁₄. The hydrocarbon can be converted
  into two other hydrocarbons as shown by the equation below
  (i) Name and draw the possible structural formula of X
  Name
  Structural formula
  (ii) State and explain the observation that would be made if a few drops of bromide
  water were added to a sample of X.
  (iii) Write an equation for the complete combustion of C₃H₈

  Date posted: June 22, 2019.  Answers (1)

• The fermentation of glucose produces ethanol as shown in the equation below C₂H₁₂O₆(aq) ---> 2CH₃CH₂OH(aq) + 2CO₂(g) (i) State how the concentration of ethanol produced could be...(Solved)
  

  The fermentation of glucose produces ethanol as shown in the equation below
  C₂H₁₂O₆(aq) ---> 2CH₃CH₂OH(aq) + 2CO₂(g)
  (i) State how the concentration of ethanol produced could be increased
  (ii) State and explain the observation that would be made when a piece of sodium
  metal is added to a sample of ethanol contained in a beaker
  (iii) Give two commercial uses of ethanol other in the manufacture of alcoholic
  drinks

  Date posted: June 22, 2019.  Answers (1)

• The following equations represents two different types of reactions State the type of reaction represented by: (i) (ii)(Solved)
  

  The following equations represents two different types of reactions
  
  State the type of reaction represented by:
  (i)
  (ii)

  Date posted: June 22, 2019.  Answers (1)

• Corrosive is a destructive process in which iron which is converted into hydrated iron (III) oxide State: (i) two conditions necessary for rusting to occur (ii) One method used...(Solved)
  

  Corrosive is a destructive process in which iron which is converted into hydrated iron
  (III) oxide
  State:
  (i) two conditions necessary for rusting to occur
  (ii) One method used to protect iron from rusting

  Date posted: June 22, 2019.  Answers (1)

• An ore is suspected to contain mainly iron. Describe a method that can be used to confirm the presence of iron in the ore(Solved)
  

  An ore is suspected to contain mainly iron. Describe a method that
  can be used to confirm the presence of iron in the ore

  Date posted: June 22, 2019.  Answers (1)

• What is the oxidation number of chlorine in CO₄?(Solved)
  

  What is the oxidation number of chlorine in CO₄?

  Date posted: June 22, 2019.  Answers (1)

• A sealed glass tube containing air at s.t.p was immersed in water at 1000c. Assuming that there was no increase in the volume of the glass...(Solved)
  

  A sealed glass tube containing air at s.t.p was immersed in water at 1000c. Assuming
  that there was no increase in the volume of the glass tube due to the expansion of the
  glass, calculate the pressure of the inside tube. (standard pressure = 760mmHg,)

  Date posted: June 22, 2019.  Answers (1)

• Draw the structural formula of: (a) Ethanol (b) Propanoic (c) Give the name of the organic compound formed when ethanol and propanoic acid react in the presence of concentrated...(Solved)
  

  Draw the structural formula of:
  (a) Ethanol
  (b) Propanoic
  (c) Give the name of the organic compound formed when ethanol and propanoic
  acid react in the presence of concentrated sulphuric acid.

  Date posted: June 22, 2019.  Answers (1)

• State and explain the observation that would be made if a few pellets of potassium hydroxide are added to the equilibrium mixture.(Solved)
  

  State and explain the observation that would be made if a few pellets of potassium
  hydroxide are added to the equilibrium mixture.

  Date posted: June 22, 2019.  Answers (1)

• On complete combustion of a sample of hydrocarbon, 3.52 gm of carbon dioxide and 1.44g of water were formed. Determine the molecular formula of the hydrocarbon. (Relative...(Solved)
  

  On complete combustion of a sample of hydrocarbon, 3.52 gm of carbon dioxide and
  1.44g of water were formed. Determine the molecular formula of the hydrocarbon.
  (Relative molecular masses of hydrocarbon =56, carbon dioxide 44, water = 18 and
  relative atomic masses H = 1.0 and c=12.0)

  Date posted: June 22, 2019.  Answers (1)

• An isotope of Uranium 234U, decays by emission of an alpha particle to thorium ...(Solved)
  

  An isotope of Uranium 234U, decays by emission of an alpha particle to thorium
  92
  a) Write the equation for the nuclear reaction undergone by isotope.
  b) Explain why it is not safe to store radioactive substances in containers made
  from aluminium sheets.

  Date posted: June 22, 2019.  Answers (1)