a) Soluble salts of the two salts
b) Zinc loses electrons (oxidation) as Zn2+ ions goes into solution leaving electrons on the zinc rod making it negatively charged
maurice.mutuku answered the question on September 18, 2019 at 08:27
- The table below shows properties of some chlorides. Study it and answer the questions that follow.(Solved)
The table below shows properties of some chlorides. Study it and answer the questions that follow.
a) Explain the high melting and boiling points of sodium chloride.
b) Write an equation for the reaction between PC15 and water.
c) Draw the dot (•) and cross (x) diagram to show bonding in NaCl.
Date posted: September 18, 2019. Answers (1)
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The labels of two reagent bottles contained the following safety symbols.
a) What do the symbols mean ? Explain.
b) Which of the reagent is more harmful ?
Date posted: September 18, 2019. Answers (1)
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What volume of oxygen gas at r.t.p will be liberated at the anode when a current of 3 amperes is passed through magnesium sulphate solution for 45 minutes and 30 seconds. (Molar gas volume at r.t.p = 24000cm3, Faraday constant = 96500
Coulombs)
Date posted: September 18, 2019. Answers (1)
- When bismuth III Chloride is added to water, a reaction occurs and a white precipitate forms as shown below.
BiCI3(aq) + H20(l) BiOCl(s) + 2HCl(aq)
What would...(Solved)
When bismuth III Chloride is added to water, a reaction occurs and a white precipitate forms as shown below.
BiCI3(aq) + H20(l) BiOCl(s) + 2HCl(aq)
What would be the effect on the amount of the precipitate formed if sodium hydroxide solution is added to the equilibrium mixture ? Explain your answer.
Date posted: September 18, 2019. Answers (1)
- When 10g of a mixture of potassium chloride and anhydrous sodium sulphate is dissolved in water and excess barium chloride solution added. 6.9g of Barium...(Solved)
When 10g of a mixture of potassium chloride and anhydrous sodium sulphate is dissolved in water and excess barium chloride solution added. 6.9g of Barium sulphate is precipitated. Calculate the composition of the mixture. (K .= 39. Cl =35.5, Na=23, O =16, Ba=137)
Date posted: September 18, 2019. Answers (1)
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Explain why iron nails rust faster in sodium chloride solution than in tap water.
Date posted: September 18, 2019. Answers (1)
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Given the following reagents; solid sodium carbonate, solid lead (II) nitrate, water. Describe how a sample of lead (II) carbonate can be prepared in the laboratory.
Date posted: September 18, 2019. Answers (1)
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Radioactive polonium - 216 decays as shown below.
Date posted: September 18, 2019. Answers (1)
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Given the following polymer, draw the structure of the monomer.
Date posted: September 18, 2019. Answers (1)
- Give the IUPAC names of the following compounds(Solved)
Give the IUPAC names of the following compounds
i) CH3(CH2)OH
ii) CU3CH2CH(CH3)COOH
Date posted: September 18, 2019. Answers (1)
- Two elements X and Y are represented as shown below(Solved)
Two elements X and Y are represented as shown below
17X and 20Y
i) Write the formula of the compound formed when X and Y react.
ii) State the family name to which element X belongs.
iii) Element Y has a mass number of 40, how many neutrons are present in its nucleus?
Date posted: September 18, 2019. Answers (1)
- Sodium hydroxide can be prepared through the following methods: I and II.(Solved)
Sodium hydroxide can be prepared through the following methods: I and II.
a) Name one precaution that needs to be taken in method I.
b) Give the name of process A.
c) Describe the chemical test of hydrogen gas.
Date posted: September 18, 2019. Answers (1)
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Describe how a student can determine the purity of tap water in a school laboratory
Date posted: September 18, 2019. Answers (1)
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Study the flow chart below and answer the questions that follow.
(a) Name the substance
(i) A
(ii) B
(b) State the property of S02 exhibited in step 2.
Date posted: September 18, 2019. Answers (1)
- Ethanol has a molar heat of combustion of -1360kJmol-1. Calculate the heating value of ethanol. (C=12,H=1,O=16(Solved)
Ethanol has a molar heat of combustion of -1360kJmol-1. Calculate the heating value of ethanol. (C=12,H=1,O=16
Date posted: September 18, 2019. Answers (1)
- A volume of 10cm3 of ethene gas (C2H4) was exploded with 50cm3 of oxygen.
(i) Write the equation of the reaction for the combustion of ethene.
(ii)...(Solved)
A volume of 10cm3 of ethene gas (C2H4) was exploded with 50cm3 of oxygen.
(i) Write the equation of the reaction for the combustion of ethene.
(ii) Calculate the volume of gaseous mixture.
Date posted: September 18, 2019. Answers (1)
- Both molten sodium chloride and molten sodium metal conducts electricity. Explain how each of these conducts electricity
(i) Molten sodium chloride
(ii) Molten sodium metal(Solved)
Both molten sodium chloride and molten sodium metal conducts electricity. Explain how each of these conducts electricity
(i) Molten sodium chloride
(ii) Molten sodium metal
Date posted: September 18, 2019. Answers (1)
- During the electrolysis, a current of 2 amperes was passed through the copper (II) sulphate solution for 4 hours. Calculate the volume of the gas...(Solved)
During the electrolysis, a current of 2 amperes was passed through the copper (II) sulphate solution for 4 hours. Calculate the volume of the gas produced at the anode. (1 F= 96500 C, MGV = 24000cm3).
Date posted: September 18, 2019. Answers (1)
- The solubility of iron (II) sulphate at 22oC is 15.65g/100g of water. Calculate the mass of iron (II) sulphate crystals in 90g of saturated iron...(Solved)
The solubility of iron (II) sulphate at 22oC is 15.65g/100g of water. Calculate the mass of iron (II) sulphate crystals in 90g of saturated iron (II) sulphate solution.
Date posted: September 18, 2019. Answers (1)
- Use the following information to answer the questions that follow.(Solved)
Use the following information to answer the questions that follow.
a) Draw an energy cycle diagram and label the various heat changes.
b) Use the energy circle above to calculate heat of formation of methanol.
Date posted: September 18, 2019. Answers (1)