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Leno4ka [110]
2 years ago
15

Predict the formulas for calcium chloride and potassium phosphate

Chemistry
1 answer:
Sauron [17]2 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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How many milliliters of 0.260 m na2s are needed to react with 35.00 ml of 0.315 m agno3?
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The complete balanced chemical reaction is:

2 AgNO3 + Na2S --> 2 NaNO3 + Ag2S

 

First let us calculate the number of moles of AgNO3.

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From the reaction, 1 mole of Na2S is needed for every 2 moles of AgNO3 hence:

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moles Na2S required = 5.5125 x 10^-3 mol

 

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