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For the following substances, classify each as either nonelectrolyte or strong electrolyte.
a. Ca(NO3)2
b. NaOH
c. C6H12O6
d. NaBr
When a substance with the formula XBr3 reacts with water, HBr and another acid, H3XO3, are produced. H3XO3 also contains three acidic hydrogens that react with KOH. After titrating a solution made up of 3.67 g of XBr3 and 75.0 mL of water, it was discovered that 87.3 mL of 0.132 M KOH were needed to completely neutralize the acid. For the reaction of XBr3 with water, write a balanced equation.
Identify which of the following ions (Ag+, Sr2+, and Zn2+) are present in the solution given the following data:
1. The addition of sodium chloride to the solution results in a precipitate. The precipitate is filtered off.
2. The addition of potassium sulfate does not result in any precipitate.
3. The addition of sodium carbonate to the solution results in a precipitate.
Write a molecular equation for the following precipitation reactions. If no precipitate forms, write NO REACTION.
1. aluminum sulfate and sodium phosphate
2. chromium (III) nitrate and strontium iodide
3. copper (II) nitrate and lithium phosphate
Identify salt produced by each of the following acid-base reactions.
1. Ca(OH)2 (aq) + HNO3 (aq) →
2. HCl (aq) + Sr(OH)2 (aq) →
3. HClO4 (aq) + Cr(OH)3 (aq) →
When sodium hydride is dissolved in water, sodium hydroxide and hydrogen gas are formed. Give the balanced chemical reaction for the reaction.
Metals can be removed from water by precipitation.
Ca2+ (aq) + Na2CO3 (aq) → CaCO3 (s) + 2 Na+ (aq)
Fe2+ (aq) + Ca(OH)2 (aq) → Fe(OH)2 (s) + Ca2+ (aq)
If 1700 L sample of water has 4.0x10-5 M Ca2+ and 8.0x10-7 M Fe2+, calculate the moles of Na2CO3 and Ca(OH)2 needed to precipitate them.
(a) What is the balanced net ionic equation for Sr(OH)2 + CoCl3 →
(b) What are the spectator ions?
There are multiple possible values of oxidation states for arsenic ranging from –3 to +5. When arsenic is heated in oxygen, tetraarsenic hexaoxide or tetraarsenic decoxide can be produced. What is the formula and oxidation state for each compound?