- Define Standard enthalpy/heat of reaction(Solved)
Define Standard enthalpy/heat of reaction
Date posted: February 19, 2019. Answers (1)
- Calculate the molar heat of vaporization of water.(H= 1.0,O= 16.O)(Solved)
Calculate the molar heat of vaporization of water.(H= 1.0,O= 16.O)
Date posted: February 19, 2019. Answers (1)
- Write brief notes on:
1. Melting/liquidification/fusion
2.Freezing/fusion/solidification
3.Boiling/vaporization/evaporation
4.Condensation/liquidification(Solved)
Write brief notes on:
1. Melting/liquidification/fusion
2.Freezing/fusion/solidification
3.Boiling/vaporization/evaporation
4.Condensation/liquidification
Date posted: February 19, 2019. Answers (1)
- Define energy and state the two types of energy(Solved)
Define energy and state the two types of energy
Date posted: February 19, 2019. Answers (1)
- Study the flow chart below and use it to answer the questions that follow(Solved)
Study the flow chart below and use it to answer the questions that follow
Date posted: February 19, 2019. Answers (1)
- State and explain the observations made when a filter paper dipped in Lead(II) ethanoate /Lead (II) nitrate(V) solution is put in a gas jar containing...(Solved)
State and explain the observations made when a filter paper dipped in Lead(II) ethanoate /Lead (II) nitrate(V) solution is put in a gas jar containing hydrogen sulphide gas
Date posted: February 19, 2019. Answers (1)
- Fill a burette wuth 0.1M dilute sulphuric(VI)acid. Pipette 20.0cm3 of 0.1M sodium hydroxide solution into a 250cm3 conical flask. Add three drops of phenolphthalein indicator....(Solved)
Fill a burette wuth 0.1M dilute sulphuric(VI)acid. Pipette 20.0cm3 of 0.1M sodium hydroxide solution into a 250cm3 conical flask. Add three drops of phenolphthalein indicator. Titrate the acid to get a permanent colour change.Repeat with 0.1M potassium hydroxide solution in place of 0.1M sodium hydroxide solution.
State and explain the observations made.
Date posted: February 19, 2019. Answers (1)
- Place 5cm3 of 0.2M dilute sulphuric(VI)acid into four separate clean boiling tubes. Add about 0.1g of copper(II)oxide to one boiling tube. Stir.
Repeat by adding Zinc...(Solved)
Place 5cm3 of 0.2M dilute sulphuric(VI)acid into four separate clean boiling tubes. Add about 0.1g of copper(II)oxide to one boiling tube. Stir.
Repeat by adding Zinc oxide, calcium carbonate and Sodium (II)Oxide in place of the Copper(II)Oxide
State and explain the observations made.
Date posted: February 19, 2019. Answers (1)
- Put about 2cm3 of Concentrated sulphuric (VI) acid into two separate boiling tubes. Place a thin moist/damp/wet filter paper dipped in acidified potassium dichromate (VI)solution...(Solved)
Put about 2cm3 of Concentrated sulphuric (VI) acid into two separate boiling tubes. Place a thin moist/damp/wet filter paper dipped in acidified potassium dichromate (VI)solution on the mouth of the boiling tube.
Put about 0.5g of powdered charcoal and sulphur powder to each boiling tube separately, Warm. State and explain the observations made.
Date posted: February 19, 2019. Answers (1)
- Put about 2 cm3 of Concentrated sulphuric (VI) acid into three separate boiling tubes. Place a thin moist/damp/wet filter paper dipped in acidified potassium dichromate (VI)solution...(Solved)
Put about 2 cm3 of Concentrated sulphuric (VI) acid into three separate boiling tubes. Place a thin moist/damp/wet filter paper dipped in acidified potassium dichromate (VI)solution on the mouth of the boiling tube. Put about 0.5g of Copper turnings, Zinc granule and Iron filings to each boiling tube separately. State and explain the observations made.
Date posted: February 19, 2019. Answers (1)
- State the properties of Concentrated sulphuric(VI)acid(Solved)
State the properties of Concentrated sulphuric(VI)acid
Date posted: February 19, 2019. Answers (1)
- Dry litmus papers and wet/damp/moist litmus papers were put in a gas jar containing sulphur(IV) oxide gas. State and explain the observations made(Solved)
Dry litmus papers and wet/damp/moist litmus papers were put in a gas jar containing sulphur(IV) oxide gas. State and explain the observations made
Date posted: February 19, 2019. Answers (1)
- Write the equations for the reaction for the formation of sulphur (IV)oxide using two methods(Solved)
Write the equations for the reaction for the formation of sulphur (IV)oxide using two methods
Date posted: February 19, 2019. Answers (1)
- State the main compounds of sulphur(Solved)
State the main compounds of sulphur
Date posted: February 19, 2019. Answers (1)
- Calculate the volume of sulphur (IV)oxide produced when 0.4 g of sulphur is completely burnt in excess air.(S = 32.0 ,I mole of a gas...(Solved)
Calculate the volume of sulphur (IV)oxide produced when 0.4 g of sulphur is completely burnt in excess air.(S = 32.0 ,I mole of a gas occupies 24 dm3 at room temperature)
Date posted: February 19, 2019. Answers (1)
- What are allotropes?(Solved)
What are allotropes?
Date posted: February 19, 2019. Answers (1)
- Iron filings were put in a test tube containing powdered sulphur then heated on a Bunsen flame. Stop heating when reaction starts. State and explain...(Solved)
Iron filings were put in a test tube containing powdered sulphur then heated on a Bunsen flame. Stop heating when reaction starts. State and explain the observations made. Test the effects of a magnet on the mixture before and after heating. Explain
Date posted: February 19, 2019. Answers (1)
- Moist/damp/wet blue and red litmus papers were put in a gas jar containing air/oxygen. Burning sulphur was then lowered into the gas jar. State and...(Solved)
Moist/damp/wet blue and red litmus papers were put in a gas jar containing air/oxygen. Burning sulphur was then lowered into the gas jar. State and explain the observation made
Date posted: February 19, 2019. Answers (1)
- State three physical properties unique to Sulphur(Solved)
State three physical properties unique to Sulphur
Date posted: February 19, 2019. Answers (1)
- State and explain the Allotropes of Sulphur(Solved)
State and explain the Allotropes of Sulphur
Date posted: February 19, 2019. Answers (1)