Hard water contains high levels of minerals such as magnesium and calcium and can be a real pain to remove if left untreated. When hard water is boiled in an electric kettle, these minerals do not evaporate like the water does but instead remains in the kettle.
The parasite obtains food and shelter from the host. Parasitism mode of life ensures food lodging and meals. PREDATION (+/-) is a a relationship between a Predator and a Prey in which the predator is a free living organism which catches and kills another species for food. They do not get shelter from pre
The balanced chemical equation for the above reaction is as follows ;
Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
Stoichiometry of Ca(OH)2 to HCl is 1:2
Number of Ca(OH)2 moles present - 0.001 mol/L / 1000 mL/L x 25 mL
Number of Ca(OH)2 moles = 2.5 x 10^(-5) mol
Number of HCl moles needed for neutralisation = 2.5 x 10^(-5) mol x2 = 5 x 10 ^(-5) mol
The molarity of HCl solution is 0.005 M
The solution contains 0.005 mol in 1000 mL
Therefore volume of 5x10^(-5) mol in = 1000/0.005 x 5 x 10^(-5) mol = 10 mL
10 mL of HCl is needed for neutralisation
Answer:
Distillation. Methanol boils at a lower temp (~70 C), so the methanol vapor will need to be condensed to a liquid again. A high reflux ratio would yield a purer methanol. Advantages: good separation due to difference in boiling points.
Explanation:
Answer:
x=1.4*10^9
or choice a
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