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Leno4ka [110]
3 years ago
15

Predict the formulas for calcium chloride and potassium phosphate

Chemistry
1 answer:
Sauron [17]3 years ago
8 0

Answer:

CaCl2

And

potasium phosphate is a general name for salt of potassium and phosphate ions . The compounds can exist as

K3PO4 (Tripotassium phosphate)

K2HPO4 (di potassium phosphate)

KH2PO4 (mono potassium phosphate)

Explanation:

Calcium chloride salt is an ionic compound. so it contains both cations and anions. That means it has a positively charged ion and a negatively charged ion. In an ionic compound their is a transfer of electron. The valence electron or the charge ion present in an atom can be use to predict the chemical formula of this compound . Base on the compound the positive end is calcium while the negative end is chlorine .

Ca2+  and Cl-

cross multiply the charges

CaCl2

The charge of phosphate ions are (PO4)3−, (HPO4)2− and (H2PO4)−. And base on the valence electron potassium has a stable charge of +1 (K+). The phosphate ion produces the negative charge when it reacts with potassium.

If potassium goes into reaction with any of the phosphate ion it will be as follows.

K+  and  (PO4)3−

cross multiply the charge as usual

K3PO4(tripotassium phosphate)

K+ and (HPO4)2−

cross multiply the charge as usual

K2HPO4(di potassium phosphate)

K+ and (H2PO4)−

cross multiply the charge as usual

KH2PO4 (mono potassium phosphate)

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Answer:

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Explanation:

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How many grams of magnesium metal will react completely with 5.2 liters of 4.0 M HCl? Show all of the work needed to solve this
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Answer:
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Explanation:
1- getting the number of moles of HCl:
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4 = number of moles of HCl / 5.2
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2- getting the number moles of magnesium:
From the balanced equation given, we can note that one mole of magnesium is required to react with two moles of HCl. To get the number of moles required to react with 20.8 moles of HCl. we will simply do cross multiplication as follows:
1 mole of Mg ...............> 2 moles of HCl
?? moles of Mg ...........> 20.8 moles of HCl
Number of moles of Mg = 20.8 / 2 = 10.4 moles

3- getting the mass of Mg:
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Using the periodic table, we can find that the molar mass of magnesium is 24.305 grams.
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10.4 = mass / 24.305
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