A student prepares a solution by dissolving 6.40 g of solid KOH in enough water to make 400.0 mL of solution. Calculate the molarity of K+ ions in this solution.   A 30.00 mL sample of this KOH solution is added to a 250 mL volumetric flask, and water is added to the mark. What is the new molarity of K+ ions in this solution?

Q: 1) balance the following chemical equation for the reaction of hypothetical elements X, Y, and Z.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 250.0 mg of copper(II) sulfate pentahydrate (CuSO4•5H2O, 249.69 g/mol) was dissolved in water to…

A: Since mass of CuSO4•5H2O used = 250 mg = 0.25 g              (since 1 g = 1000 mg) Hence moles of…

Q: 1).  Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M…

A: Since, this is multiple questions we are answering first question.

Q: The titration of an impure sample of KHP  found that 30.00 mL of 0.050 M  NaOH was required to react…

A: Percentage of KHP can be calculated using formula: Percentage of KHP = (mass of KHP / mass of…

Q: Define

A: Introduction: The number of moles of solute in 1L of  solution is called Molarity

Q: The chemical equation for Mg(OH)2 dissolving in water is

A: Magnesium hydroxide or Mg(OH) is considered as an ionic compound which consists of Mg2+ and OH-…

Q: The following chemical reaction takes place in aqueous solution: Cu(NO,) (aq)+K,S(aq) →CUS(s)+2…

A:

Q: Fill in the blanks: An environmental chemist analyzed the effluent from an industrial process known…

A: Since the benzoic acid has only 1 acidic H  Hence moles of NaOH required for complete neutralisation…

Q: The following chemical reaction takes place in aqueous solution: 2 AgNO3(aq)+K,CO;(aq)…

A: Recall the reaction--- 2AgNO3(aq) +K2CO3(aq) ------> Ag2CO3(s) + 2KNO3(aq)  Write net ionic…

Q: Calculate the concentration of an aqueous solution with a volume of 350 mL in which 10.5 g of…

A:

Q: A chemist adds 320.0mL of a 2.1 M calcium bromide (CaBr2) solution to a reaction flask. Calculate…

A: From the given volume and molarity of the solution, moles of calcium bromide can be calculated as

Q: What mass of solid NaOH (97.0% NaOH by mass) is required to prepare 1.00 L of a 10.0% solution of…

A: Given,97.0% NaOH by massDensity= 1.109 g/mL

Q: From the equation, what is the mass of NaOH when 5 g of Mg(OH)2 precipitates? What is its percent by…

A:

Q: A piece of chalk (mainly calcium carbonate) is placed in 250. mL of 0.337 M HCl. All the CaCO3…

A:

Q: 3.682 g sample of KClO3 is dissolved in enough water to give 375. mL of solution. What is the…

A:

Q: A student makes two separate solutions, KCl (aq) and  NaCl (aq). After the student returns from…

A:

Q: An intravenous electrolyte solution has a Na+ ion concentration of 154 mEq/L. A patient in the…

A: The concentration of Na+ is given as 154 mEq/L. It is required to calculate the number of…

Q: Concentrated phosphoric acid is 90% H;PO, by mass and the remaining mass is water. The molarity of…

A: a) Assuming we have 100 mL of the H3PO4 solution  hence moles of acetic acid = concentration X…

Q: A solution is prepared by dissolving 3.0 g iron(II) chloride (MW=126.8 g/mol) with 75.0 mL of water.…

A: Solution Molar concentration is that the most convenient technique of expressing the concentration…

Q: The solubility of magnesium hydroxide, Mg(OH)2, in water is 9.0 × 10–4 g/100 mL. What volume of…

A:

Q: What is the concentration in the molarity of an aqueous solution which contains 18.01% by mass…

A: Molarity = moles of ethylene glycolvolume of the solution, L Basis : Let the mass of the solution be…

Q: Due to its highly conductive nature, potassium hydroxide often is used as the electrolyte in…

A: When any solution is diluted, the new concentration can be calculated using the dilution equation:…

Q: What is the concentration of sodium ions in a solution prepared by dissolving 5.00 grams of sodium…

A:

Q: The following chemical reaction takes place in aqueous solution: MgCl,(aq)+2 KOH(aq) →Mg (OH),(s)+2…

A:

Q: Complete the balanced chemical equation for the following reaction between a weak base and a strong…

A: The Chemical reaction follows the law of conservation of mass. According to the law of conservation…

Q: A piece of chalk (mainly calcium carbonate) is placed in 250. mL of 0.281 M HCl. All the CaCO3…

A: Explanation Step-1 Molarity: Molarity is well-defined as the moles of a solute per litres of a…

Q: The following chemical reaction takes place in aqueous solution: 2 Fe(NO;),(aq)+3 Na,S(aq)…

A:

Q: The following chemical reaction takes place in aqueous solution: ZNSO,(aq)+2 KOH(aq)…

A: Balanced molecular equation is given by,

Q: The following chemical reaction takes place in aqueous solution: 2 AgNO3(aq)+Na,S(aq)…

A: To write the net ionic equation the following steps are involved 1. Write the balanced equation 2.…

Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3,…

A: Given: Hardness=175 mg CaCO3/L

Q: Consider a solution prepared by adding 2.70 g acetic acid, CH3CO2H, to 122.8 g of H2O. (a) what is…

A: Given: Mass of water = 122.8 g. And mass of acetic acid = 2.70 g.

Q: The solubility of the hydroxide of a hypothetical metal, Me, in water is 84.08 g MeOH per 47.18 mL…

A: Given,  Solubility of MeOH in water = 84.08 g/47.18 mL  Calculate amount of water in mL needed to…

Q: A piece of chalk (mainly calcium carbonate) is placed in 250. mL of 0.364 M HCl. All the CaCO3…

A:

Q: The concentration of a stock solution of potassium dichromate is 0.50 mol/L. If you were to take 200…

A:

Q: Write the balanced equation for the reaction that occurs: x x. He MgSO (aq) + BaCl, (aq)→ | Write…

A: Net ionic equation is used to represent the chemical species that are involved in the chemical…

Q: How many grams of magnesium phosphate, Mg3(PO4)2, would you need if you were required to make 270.0…

A: MOLARITY: Molarity is defined as the measure of the substance with a specific volume of the solution…

Q: potassium hydrogen phthalate. (KHC8O4H4, molecular mass 204.22 g mol/L) - Knowing that potassium…

A:

Q: What is the concentration in molarity of an aqueous solution which contains 26.41% by mass ethylene…

A: Molarity,M=4.42 mol/L

Q: The maximum permissible amount of cadmium (M=112 g/n) in drinking water is 0.01 mg/L. What is the…

A: Given that : The maximum permissible amount of cadmium in drinking water is 0.01 mg/L. We have to…

Q: Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person…

A:

Q: The following chemical reaction takes place in aqueous solution: FeSO,(aq)+2 NAOH(aq)…

A: Given   The given ionic compounds are NaOH and FeSO4.

Q: The following chemical reaction takes place in aqueous solution: Fe(NO3),(aq)+2 NaOH(aq)…

A:

Q: The following chemical reaction takes place in aqueous solution: MgCl,(aq)+2 KOH(aq)→Mg(OH),(s)+2…

A: Ans  Molecular chemical equation for  MgCl2aq + 2KOHaq ---------> Mg(OH)2s + 2KClaq Total ionic…

Q: A student prepares a solution by dissolving 9.23 g of solid KOH in enough water to make 300.0 mL of…

A: Given = mass of KOH = 9.23 g Volume of solution = 300 ml = 0.300 L

Q: The following chemical reaction takes place in aqueous solution: Zn (NO3), (aq)+2KOH(aq) →…

A: Balance Chemical equation means number of atoms or ions should be equal in both side (reactant and…

Q: A chemist prepares a solution of magnesium fluoride (MgF2) by measuring out 0.0553 g of magnesium…

A: Concentration in mol/L = Number of mols of solute/Volume of solution (L) Number of mols =mass/molar…

Q: chemist prepares a solution of silver(I) nitrate AgNO3 by measuring out 6.4102 x 10^2 μmol of…

A: Molarity is defined as total number of solute dissolve in one litre of solution Molarity…

Q: A student prepares a solution by dissolving 7.46 g of solid KOH in enough water to make 550.0 mL of…

A: A strong base dissociates in the solution completely. KOH is a strong base which gives potassium…

Q: The following chemical reaction takes place in aqueous solution: MgCl,(aq)+2 KOH(aq)…

A: We have to predict the net ionic equation.

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.