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-Turns blue litmus paper red,
-They have a ph scale of less than 7 on the ph meter.
Githiari answered the question on October 11, 2017 at 14:07
- Give the colour observed when a litmus paper is dropped into the solutions of the following (i)Distilled water (ii)sour milk (iii)Lemon juice(Solved)
Give the colour observed when a litmus paper is dropped into the solutions of the following
i)Distilled water
ii)sour milk
iii)Lemon juice
Date posted: October 11, 2017. Answers (1)
- Distinguish between an acid and a base(Solved)
Distinguish between an acid and a base
Date posted: October 11, 2017. Answers (1)
- Give two application of bases in the society(Solved)
Give two application of bases in the society
Date posted: October 11, 2017. Answers (1)
- A solution of hydrogen chloride gas can conduct an electric current, while that hydrogen chloride in methylbenzene does not conduct . Explain(Solved)
A solution of hydrogen chloride gas can conduct an electric current, while that hydrogen chloride in methylbenzene does not conduct. Explain
Date posted: October 8, 2017. Answers (1)
- Describe the non-luminous flame of Bunsen burner and give a reason why it is preferred when heating substances in laboratory(Solved)
Describe the non-luminous flame of Bunsen burner and give a reason why it is preferred when heating substances in laboratory
Date posted: October 8, 2017. Answers (1)
- Sodium is highly electropositive,hence it can only be isolated by electrolysis(a)Name the major ore from which sodium is extracted(b)why should ore be in molten...(Solved)
Sodium is highly electropositive,hence it can only be isolated by electrolysis
(a)Name the major ore from which sodium is extracted
(b)why should ore be in molten form before electrolysis
(c)Give the detrimental effect on the enviroment that may result from the extraction of sodium
Date posted: October 6, 2017. Answers (1)
- Sodium is highly electropositive,hence it can only be isolated by electrolysis(a)Name the major ore from which sodium is extracted(b)why should ore be in molten...(Solved)
Sodium is highly electropositive,hence it can only be isolated by electrolysis
(a)Name the major ore from which sodium is extracted
(b)why should ore be in molten form before electrolysis
(c)Give the detrimental effect on the environment that may result from the extraction of sodium
Date posted: October 6, 2017. Answers (1)
- (a)Patients with heart burn are advised to take milk of magnesia.Explain(b)Write an ionic equation between (ii)hydroxide and dillute sulphuric (vi)acid(Solved)
(a)Patients with heart burn are advised to take milk of magnesia.Explain
(b)Write an ionic equation between (ii)hydroxide and dillute sulphuric (vi)acid
Date posted: October 6, 2017. Answers (1)
- Propanol and butanol are third and fourth members respectively of the same homologous series.State and explain how their boiling point compare(Solved)
Propanol and butanol are third and fourth members respectively of the same homologous series.State and explain how their boiling point compare
Date posted: October 6, 2017. Answers (1)
- You are provided with the following :copper turning,dilute sulphuric acid and a source of heat. Describe fully how you would prepare copper (ii) sulphate crystals(Solved)
You are provided with the following :copper turning,dilute sulphuric acid and a source of heat. Describe fully how you would prepare copper (ii) sulphate crystals
Date posted: October 6, 2017. Answers (1)
- (a)Phosphorus has melting point of 40o and 590o.Explain
(B)Why is phosphorus stored under water ...(Solved)
(a)Phosphorus has melting point of 40o and 590o.Explain
(B)Why is phosphorus stored under water
Date posted: October 6, 2017. Answers (1)
- When lead nitrate and sodium sulphate react, a white precipitate is formed. (i)Identify the white precipitate.(ii) Write an ionic equation of the reaction(Solved)
When lead nitrate and sodium sulphate react, a white precipitate is formed. (i)Identify the white precipitate.(ii) Write an ionic equation of the reaction
Date posted: October 5, 2017. Answers (1)
- Starting with copper metal, describe how you can prepare solid copper (ii) carbonate(Solved)
Starting with copper metal, describe how you can prepare solid copper (ii) carbonate
Date posted: October 5, 2017. Answers (1)
- What observation will be made when a few drops of concentrated sulphuric (VI) acid are added to crystals of sugar? Explain your answer (Solved)
What observation will be made when a few drops of concentrated sulphuric (VI) acid are added to crystals of sugar? Explain your answer
Date posted: October 4, 2017. Answers (1)
- Explain one way in which sulphur (IV) oxide is a pollutant(Solved)
Explain one way in which sulphur (IV) oxide is a pollutant
Date posted: October 4, 2017. Answers (1)
- The molar enthalpy of neutralisation between hydrochloric acid and ammonia solution was found to be -52.2 kj mol4, while that of hydrochloric acid and...(Solved)
The molar enthalpy of neutralisation between hydrochloric acid and ammonia solution was found to be -52.2 kj mol4, while that of hydrochloric acid and sodium hydroxide was 57.1 kJ mol-1. Explain the difference in these values.
Date posted: October 4, 2017. Answers (1)
- What is meant by the term 'Enthalpy of formation'? (Solved)
What is meant by the term 'Enthalpy of formation'?
Date posted: October 4, 2017. Answers (1)
- Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was...(Solved)
Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was reacted with water. (Molar gas volume at room temperature is 24 dm3, Relative atomic mass of M = 7).
Date posted: October 4, 2017. Answers (1)
- A solution was made by dissolving 8.2g of calcium nitrate to give 2 litres of solution. (Ca = 40.0; N = 14.0;...(Solved)
A solution was made by dissolving 8.2g of calcium nitrate to give 2 litres of solution. (Ca = 40.0; N = 14.0; O = 16.0).
Determine the concentration of nitrate ions in moles per litre
Date posted: October 4, 2017. Answers (1)
- When 15cm3 of a gaseous hydrocarbon, P, was burnt in 100cm3 of oxygen, the resulting gaseous mixture occupied 70cm3 at room temperature and pressure....(Solved)
When 15cm^3 of a gaseous hydrocarbon, P, was burnt in 100cm^3 of oxygen, the resulting gaseous mixture occupied 70cm^3 at room temperature and pressure. When the gaseous mixture was passed through potassium hydroxide solution, its volume decreased to 25cm^3.
(a) What volume of oxygen was used during the reaction?
Date posted: October 4, 2017. Answers (1)