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What mass of calcium carbonate (in grams) can be dissolved by 4.0 g of hcl? (hint: begin by writing a balanced equation for the
2 answers:
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Answer: will make an electrolytic solution
Explanation:
Electrolyte is a substance which dissociates into ions when dissolved in water and thus is able to conduct electric current through them.
Compounds in solid form does not conduct electricity due to the absence of free ions.
a) is a covalent compound and thus not an electrolyte.
b) is a covalent compound and thus do not dissolve in water and thus is not an electrolyte.
c) is an ionic compound and thus dissolve in water and give ions which help to conduct electricity.
d) is a covalent compound and thus do not dissolve in water and thus is not an electrolyte.
Answer:
The mass of K₂Cr₂O₇ needed to create a saturated solution in 400 grams of water at 50°C is 120 grams
Explanation:
To answer the question, we will be required to know the solubility of potassium dichromate, K₂Cr₂O₇ in H₂O at 50°C
From the solubility curve, we have, 30 g of K₂Cr₂O₇ will be required to create a saturated solution in 100 g of at 50°C. Therefore, the amount of K₂Cr₂O₇ that will be required to create a saturated solution in 400 g of water, is given by the following equation;
Therefore, the mass of K₂Cr₂O₇ needed to create a saturated solution in 400 grams of water at 50°C = 120 grams.