1. Balance the reaction equations below. a) HCl(aq) + _Mg(OH)2(s) – Н-0() + MgCl2(aq) b) _HNO3(aq) + Na,S(aq) → _H,S(g) + NANO3(aq) 2. What is the moles HCI-to-moles MgCl2 ratio in reaction (a)?

A student weighs out a 11.4 g sample of AI(CH3COO)3, transfers it to a 250. mL volumetric flask, adds enough water to dissolve it and then adds water to the 250. mL tick mark. What is the molarity of aluminum acetate in the resulting solution? Molarity =  M

Some chemical reactants are listed in the table below. Complete the table by filling in the oxidation state of the highlighted atom. oxidation state of highlighted atom species Na (aq) H30"(aq) co? (aq) Cl,(9)

For the reaction that occurs when the following solutions are mixed, write (i) the balanced molecularequation including states of matter of all products, (ii) the complete/full ionic equation, (iii) the net ionic equation AND (iv) the names of all reactants.

You are making 750 mL of a 0.7 M Ca(OH)2 solution.  How many moles of Ca(OH)2 will be added?  How many grams of Ca(OH)2 will be massed out in a weigh boat?

TReferences] A student titrates an unknown amount of potassium hydrogen phthalate (KHCgH,O, often abbreviated KHP) with 22.07 mL of a 0.1800-M N&OH solution. KHP (molar mass = 204.22 g/mol) has one acidic hydrogen. What mass of KHP was titrated (reacted completely) by the sodium hydroxide solution? Mass

Write the net ionic equation for the following: CaCla + NazCO; * Co.*- (aq) + Ca²* (aq) CACO: (s) Na (aq) + Cl- (aq)NaCl(s) Ca2+ (aq) + Na* (aq) – CaNa: (s) no precipitate forms Which of the following ionic reaction represents a complete ionic equation? I. Al,0, (s) + 6H* (aq) + 6C1O, (aq) → 2 Al3*(aq) + 6C10, (aq) +3 H, 0 (I) II. PbCr0, (s) → Pb2+(aq) + Cr0; (aq) III. Mg(OH)2 (s) + H2SO, (aq) → MgSO, (aq)+ 2 H20 (1) IV. H2CO, (aq) + 20H (aq)→ clo;- (aq) + 2 H,0 (I) II IV

1. For each of the following reactions, identify the category of reaction, balance reaction, and describe how you knew a reaction took place. To indicate an already balanced reaction, write balanced above the reaction. Reaction 1 Balance: H2O(1) + NO2(g) Cu(s) Cu(NO3)2(aq) + HNO3(aq) + Reaction Category: How did you identify a reaction took place? Reaction 2 Balance: Cu(NO3)2(aq) + NaOH(aq) – Cu(OH)2(s) + NaNO3(aq) Reaction Category: How did you identify a reaction took place? OhoW Reaction 3 Balance: Cu(OH)2(s) → CuO(s) + H2O(1) Reaction Category: How did you identify a reaction took place? Reaction 4 Balance: CuO(s) + H2SO4(aq) – CuSO4(aq) + H2O() Reaction Category: How did you identify a reaction took place? Reaction 5 Balance: CuSO4(aq) + Zn(s) → ZNSO4(aq) + Cu(s) Reaction Category: How did you identify a reaction took place?

If 23.1 g of NaOH (MM = 40.00 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the concentration of NaOH in the resulting solution? What quantity in moles of NaI are in 55.8 grams of NaI ?

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP. How many grams of KHP are needed to exactly neutralize 20.5 mL of a 0.381 M barium hydroxide solution? Mass = grams KHC, H4O4