Balance the following chemical equation (if necessary): Ca(OH)2(s)+H3PO4(aq)4>H2O(I) +Ca3(PO4)2(aq)

Balance the following equation, in basic solution, ClO4− (aq) + C6H14O4(aq) → Cl−(aq) + HCO3− (aq)

Complete and balance the equation for the single displacement reaction between sodium and lead (II) nitrate. Phases are optional. Balanced equation: Na(s)+Pb(NO3)2(aq) =

To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a 4.30 g sample of the shell to a fine powder and titrates it to the endpoint with 233. mL of 0.2700M hydrogen chloride (HCI) solution. The balanced chemical equation for the reaction is: 2HCl(aq) + CO3(aq) → H₂CO3(aq) + 2Cl(aq) 19 0 What kind of reaction is this? O precipitation O acid-base redox X olo If you said this was a precipitation reaction, enter the chemical formula of the precipitate. 0 Ar If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has 3 significant digits. П 0 0% S ?

The following chemical reaction takes place in aqueous solution: CuBr2 (aq) + 2NaOH (aq) → CuOH2 (s) + 2NaBr (aq) Write the net ionic equation for this reaction.

Balance the following equations:

A volume of 10 mL of an unknown hydrochloric acid sample was diluted to 100 mL. The diluted solution was then titrated against a solution of sodium carbonate (prepared by dissolving 0.2188 g of solid in 50 mL distilled water). Hydrochloric acid reacted with sodium carbonate according to the following equation: 2 HCI (aq) + Na,CO3 (aq)H20 () + CO2 (g) + 2 NaCl (aq) A volume of 15.2 mL of the hydrochloric acid was required to complete the reaction in the titration process. A second titration was done between the same acid sample against a blank for indicator correction, a volume of 0.3 mL was consumed by the indicator. Find the moles of HCI added and concentration of dilute HCI solution. [MM of Na CO3 = 105.99 g/mol, MM of HCI = 36.46 g/mol] 2.06x10-3 mol ; 0.277 M B 2.06 x10-3 mol; 0.135 M 4.13x10-3 mol ; 0.277 M 4.13x10-3 mol ; 0.272 M

Balance the following chemical equation (if necessary): Na:PO:(aq) + NİCI:(aq) → Nis(PO+)>(s) + NaCI(aq)

To measure the amount of chlorine in a well-boring fluid, an analytical chemist adds 0.3600M silver nitrate AgNO3 solution to a 24.00g sample of the fluid and collects the solid silver chloride AgCl product. When no more  AgCl is produced, he filters, washes and weighs it, and finds that 1.28g has been produced. The balanced chemical equation for the reaction is: Cl−(aq) + AgNO3(aq) -> AgCl(s) + NO−3(aq) What kind of reaction is this? If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of Cl in the sample. Be sure your answer has the correct number of significant digits.

To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a 4.20 g sample of the shell to a fine powder and titrates it to the endpoint with 302. mL of 0.210M hydrogen chloride (HCI) solution. The balanced chemical equation for the reaction is: 2HCl(aq) + CO3(aq) → H₂CO3(aq) + 2Cl¯ (aq) 1 What kind of reaction is this? If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has 3 significant digits. precipitation O acid-base O redox 0 0 0 п% X