# Calculate the molarity (M) of a solution of the strong base KOH if the pH is 12.5.

52,711 results, page 7

### acid-base titrations

what is it important to keep the NaOH solution covered at all times? How will the molarity of the NaOH solution be affected by its continued exposure to the atmosphere? The pale pink color of the titration solution at the end point will fade to colorless after several minutes ...

### Chemistry

If 845mL of a 2.5x10^-5 mol/L solution of Ni(NO3)2 was mixed with 195mL of a 4.86x10^-2 mol/L solution of KOH, would precipitate form? Calculate the ion product for the potential precipitate. The Ksp of Ni(OH)2(s) is 6.0x10^-16

### Chemistry

A 40.0 mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the pH at the equivalence point for the titration of HNO2 and KOH. I got pH= 11.74.

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In a experiment to determine the molecular weight and the Ka for ascorbic acid (vit. c.) a student dissolved 1.3713g of the monoprotic acid in water to make 50 mL of solution. The pH was monitored throughout the titration. The equivalence point was reached when 35.23 mL of the...

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1) If I add 10 grams of salt into 0.1 L of water, what is the molarity of the solution? 2) Serial dilution is a common technique to make low concentration solutions. Each Serial Dilution involves taking half the solution and mixing it with a solvent, to halve the concentration...

### chemistry

A student is given 3 beakers: Beaker 1- 50.0 ml of a solution produced by dissolving 6.00 grams of a weak monoprotic acid ,HX, in enough water to produce 1 liter of solution. The empirical formula of HX is CH2O. The solution contains 3 drops of phenolphthalein. Beaker 2- A 0....

### AP CHEMISTRY

1) Calculate the molarity of a solution of sodium hydroxide, NaOH,if 23.64 mL of this solution is needed to neutralize 0.5632g of potassium hydrogen phthalate. 2) It is found that 24.68 mL of 0.1165M NaOH is needed to titrate 0.2931 g of an unknown acid to the phenolphthalein ...

### Chemistry

A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. 1. What is the molarity of the magnesium sulfate solution? 2. What is the molarity of the magnesium ion? 3. What is the molality of ...

### Chemistry

Write the formula of CH3NH+3 conjugate base. and Indicate whether the conjugate base of CH3NH+3 is a strong base, a weak base, or a species with negligible basicity.

### High School Chemistry

10mL of 0.10M HCl is given. What is the pH? How many milliliters of 0.10M NaOH would be required to neutralize it? What is the pH of the neutralized solution? What would the pH of the solution be if you added 20mL of NaOH? Here's what I have so far: pH of HCl=-log(0.10M)= 1 ...

### AP Chemistry

An aqueous sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution at 20°C has a density of 1.3294 g/mL. Calculate (a) the molarity, (b) the molality, (c) the percent by mass, and (d) the mole fraction of H2SO4 for the solution. (MM H2SO4 = 98.08; MM H2O = 18...

### Chemistry

12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.

### science

0.63 gm of oxalic acid (COOH)2 2H20 are dissolved in 500 ml of solution. Calculate the molarity of the solution?

### chemistry please help!!

what is the net ionic equation for the reaction between a strong acid and a strong base? what does it mean by this question?/ (: thanks.

### Chemistry

I don't understand how to work out the volumes of weak acid and strong base to mix to make 1L of buffer when given the concentrations of weak acid and strong base (in my case 0.160M NaOH and 0.200M H3PO4) and the pH required (7.00). Specifically the textbook is Fundamentals of...

### Chemistry

I don't understand how to work out the volumes of weak acid and strong base to mix to make 1L of buffer when given the concentrations of weak acid and strong base (in my case 0.160M NaOH and 0.200M H3PO4) and the pH required (7.00). Specifically the textbook is Fundamentals of...

### Chemisty

A solution contains 0.0653g of compound in 8.31g of ethanol. The molarity of the solution is 0.0368m. Calculate the molecular weight of the compound

### Chem 1010

15.3 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 600 mL of solution. Calculate the molarity of the KCl solution.

### Chemistry

Calculate the pH of the titration of 100.00 mL of 0.200 M HOCI with 0.400 M KOH after 0, 25.00, 50.00, & 75.00 mL of KOH have been added. The Ka for HOCI is .000000035...Please Help!!!!

### chemistry

calculate the PH during the titration of 50.00 ml of 0.300 M HNO3 with 0.600 M KOH after 0, 15.50, 25.00, and 40.00 ml of KOH have been added. Graph the titration curve

### chemistry

calculate the PH during the titration of 50.00 ml of 0.300 M HNO3 with 0.600 M KOH after 0, 15.50, 25.00, and 40.00 ml of KOH have been added. Graph the titration curve. Ph=

### Chemistry

Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l) ¨ 2 KAl(OH)4 (aq) + 3 H2 (g)

### Chemistry

Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)->2 KAl(OH)4 (aq) + 3 H2 (g)

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Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution

### CHEMISTRY

CALCULATE THE MOLARITY OF 50.0g OF NaCL IN 7820mL OF SOLUTION

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Calculate the molarity of 17.g of NaCl in 881 ml of solution

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calculate the molarity of a g NaCl in 250 ml solution.

### college chem

Calculate the molarity of the solution: 42.6 g NaCl in 1.58 L

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A solution of NH3 in water has a pH of 11.17. Calculate it's molarity

### Science

Calculate the molarity of 10 % HNO3 (w/w) solution if its density is 2.0 g/cc at 25° C.

### Chemistry

4 Questions on molarity that I really don't understand. I have the formulas, but they don't seem to fit in to the question right. Please take a look, thanks! 1. Calculate the weight, in grams, of HNO3 present in 1.0 litre of 0.10M of solution. 2. What is the concentration, in ...

### Chemistry

Urgent... Someone please help!! Can someone please check to see if I am doing these correctly, I have a test tomorrow... Thank you :) Q) Calculate the new molarity of a 35mL sample of 0.450 M CaCl2 solution that is diluted with enough water to make 250 mL of solution. A) 0.450...

### Chemistry

What are the general equations for reaction of 1. Strong acid and weak base 2. Strong base and weak acid?

### Chemistry

Calculate the pH of a 5.90 10-3 M solution of H2SO4 I have tried doing this as pH=-log[H+] and also by multiplying the Molarity by two because there are two hydrogens and then doing the -log but both ways have gotten me the wrong answer is there something i am missing? same ...

### chem

I posted a question earlier that I was having trouble with, but I was unable to attempt to try it again for several days after posting. The question was: A buffer is made up of .300 L each of .500 M KH2PO4 and .317 M K2HPO4. Assuming tha the volumes are additive, calculate a) ...

### Chem

A tank car containing concentrated HCL (molarity 12.1) derails and spills exactly 1500 L of acid. Solid potassium hydroxide is required ot neutralize the spill. (a) Write a balanced chemical equation. HCl + KOH -> kCl + H2O (b) What is the molar ratio between acid and base...

### chemistry2

Hydrochloric acid is sold as a concentrated acqueous solution. If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate A) MOLALITY B)THE % BY MASS OF HCl in the solution

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How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion? Calculate the molarity of the solution. ______g ______M i honestly don't know where to start, but i know that M=mol/L will be involved somewhere... Please help...

### chemistry

8.058g x 10-2 kg of washing soda na2co3 10h20 is dissolved in water to obtain 1L of a solution of density 1077.2kg/m3. Calculate the molarity, molality and mole fraction of na2c03 in the solution? who helps

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Find the molar masses of the following compounds: 1. LiI 2. PbCO4 3. Mg(OH)2 4. (NH4)3PO4 Find the percent composition (percent by mass) of the given element in the following compounds: 1. Fluorine in AgF 2. Hydrogen in glucose (C6H12O6) 3. Oxygen in Fe2(SO4)3 PART II: ...

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A titration of 15.75mL HCL of an unknown molarity requires 20.35mL of 0.0903M NaOH solution. What is the molarity of the HCl solution?

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What formula do I use to figure. 16.5 g of KCL (MM=74.55 g/mol) is dissolved in enough water to make 575 mL of solution. Calculate the molarity of the KCl solution.

### chemistry urg!

Hydrochloric acid is sold as a concentrated acqueous solution. If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate A) MOLALITY B)THE % BY MASS OF HCl in the solution

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Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

### Chemistry

Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

### science

A solution of NaOH(molar mass 40g mol-1)is prepared by dissolving 1.6g of NaOH in 500 cm cube of water.Calculate molarity(M) of the solution

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the density of an aqueous solution containing 10.0% by mass ethanol is 0.984 g/ml. calculate molality and molarity. what volume of the solution would contain 1.15 g ethanol ?

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An aqueous solution is 8.50% ammonium chloride, NH4Cl, by mass. The density of the solution is 1.024g/mL. Calculate the molality, mole fraction, and molarity of NH4Cl in the solution. I know the formulas needed but I'm not sure where to start. M = moles solute/1 L solution m...

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Molarity of KHP ___ moles/L with a KOH titrant

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What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23C? Assume density for water is exactly 1g/mL. ----------------------------------- This is what i have so ...

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Acetic acid (HOAc) is a weak acid with a Ka= 1.8 X 10^-5 and sodium hydroxide (NaOH) is a strong base. What is the pH of a solution made by mixing 75.0 ml of a 0.160 M solution NaOH and 25.0 ml of a 0.640 M solution of HOAc? I got a pH of 5.22, but I am not sure if this is ...

### CHEMISTRY

How can we determine the equivalence point ( or end point ) in the curves in titration ( strong acid/weak base and weak acid/strong base )

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A sample of potassium hydrogen oxalate, KHC204, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

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Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me

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A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

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A 0.0875 M solution of aqueous ammonia was titrated with a solution of sulphuric acid. If 25.00 mL of the ammonia solution required 30.66 mL of the acid to reach the end-point, calculate the molarity of the acid. NH3(aq) + H2SO4(aq) ¨ (NH4)2SO4(aq)

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5.85g of sodium chloride is dissolved in 250mL of solution. Calculate: a)the molarity of the solution b)the mass percentage of the solute. can we use the given volume(i.e,250mL as total volume of the solution or volume of water in this problem?

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a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. help please 25g/58.44g NaCl=.428 mol 1000 grams of solvent H20 25g/58,...

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Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution

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Can someone make sure that I am correct with my first solution? Also I need help with the 2nd problem. I am a little confused about where to begin. 1.) 1.7423g of potassium dichromate were placed in a 250.00 mL volumetric flask and water was added to the mark. Calculate the ...

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Calculate the pH of the resultant solution when 40.00 mL of 0.250 M H2SO4 are mixed with 30.00 mL of 0.450 M KOH. The answer says it is 1.032...I get 12.70 (and I subtract that from 14 I still only get 1.3) Thanks.

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Calculate the number of milliliters of 0.782 M KOH required to precipitate all of the Mn2+ ions in 112 mL of 0.461 M Mn(NO3)2 solution as Mn(OH)2.

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an aqueous solution solution of sodium borate is sometimes used to to fire-proof wood. a. what is the molarity of 2.50 L of solution that contains 1.85 moles of sodium borate? b. what is the molarity of 45.0 L of solution that contains 6.78 kg of sodium borate? c. how manny ...

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What how can I calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)->2 KAl(OH)4 (aq) + 3 H2 (g) Please show steps ..

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A sample of the primary standard, Potassium hydrogen phthalate, weighing 0.3589g requires 14.96mL of NaOH solution for neutralization. calculate the molarity of the NaOH solution.

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sodium metal dissolves im liquid mercury to form of NA(s) and Hg(l) are 0.97 g/ml and 13.6 g/ml respectively. a sodium amalgoum is made by dissolving 10 ml Na (s) in 20.0 ml Hg (l). The final volume of solution is 21.0 ml. Calculate the molarity of Na in the solution.

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A sample of 30.0 mL of sulfuric acid solution was titrated with 0.720 M KOH. It was found that 46.9 mL of the base was needed to neutralize the acid. What is [H2SO4]? would you do (30.0)(0.720) / 46.9 ?

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What is the molarity of Cu2+ in a catalyzed reaction using 3 drops of CuSO4 at .03M in 50.0ml, and what is the molarity of Cu2+ using 6 drops? (Consider the extent of dilution of the 0.1 M CuSO4 solution in preparing the 50 mL reaction solution. Estimate 20 drops/mL.) My Work...

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If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the solution? My answer is 15g ...

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1. The atmosphere of earth is an example of what kind of solution? A. liquid-liquid B. gas-liquid C. gas-gas*** D. solid liquid 2. Which of the following will result in a greater amount of oxygen dissolving in water? A. Heat the water*** B. Decrease the oxygen gas pressure C. ...

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Imagine that you needed to choose an indicator for the titration of a strong base (like NaOH) with a strong acid (like HNO3). You have the indicators in Table 1 available. Which indicator would you choose? Why? Indicator [HIn] [ In] pKa Maryland Red- Red Blue 4.3 Terrapin ...

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Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate? so would I have to find the number of moles of (NO3)2 and then divide it by the 0.111 M to get the molarity of the nitrate ion I am so confused please explain the set up I don't want the answer...

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Why is the equivalence point of a weak acid-strong base titration above 7.0? How can the data reflect this? The titration of a weak acid with a srong base produces a salt of the two. The anion is hydrolyzed in water solution but the cation is not. A^- + HOH ==> HA + OH^- ...

### molarity

calculate the molarity of k+ in a soln prepared by adding .2L of .200M K3PO4 and 75.0mL of .5M K3PO4. assume volumes are additive. A few of steps here and more than one way to answer the problem You need to calculate the total number of moles of K3PO4 from the two volumes and ...

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A 4.0−L sample of a 6.3M NaCl solution is diluted to 50L . What is the molarity of the diluted solution? How would I set this up?

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When I have the table filled out, what would I need to do in order to calculate the solubility product for calcium hydroxide? The following is what I have in mind, please tell if I am incorrect or correct. Ksp = [Ca+2][OH-1]2 You should have an average value for the amount of ...

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Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? (Select all that apply.) NaCN and HCN NaCN and NaOH HCN and NaOH HCl and NaCN HCl and NaOH I thought it was the middle three because each either has a ...

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Bit confused about this question. especially a and b. Not really sure which values to use or how. Thanks! A solution is made by dissolving 1.71g of barium hydroxide, Ba(OH)2 (s), in distilled water and then adding more distilled water until the total volume of the solution is ...

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Calculate the molarity of 500. mL of solution containing 21.1 g of potassium iodide

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Calculate the molarity of a 5.4% sodium hydroxide solution whose density is 1.07 g/mL.

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calculate the molarity of a solution when 5g of urea is dissolved in 600ml of water

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Calculate the molarity of a 100. mL solution containing 22.3 g of sucrose (C12H22O11)

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Calculate the molarity (M) of a solution if you have 0.34 mol of NaOH in 19 ml of water

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Calculate the molarity (M) of 156.2g of H2SO4 in 1.275L of solution.

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Calculate the molarity of a 6% solution of ammoniun nitrate of density 1.025 g/mL

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A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

### Chemistry

A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

### Chemistry-Dr.Bob

Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution.

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What is the pOH of a 0.032 M Ca(OH)2 (strong base) solution? i solved it by doing 14=-log (0.064) 14-1.19= 12.81 but the right answer is 1.19, why? i thought the OH in the problem meant i had to use 14?

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You add thiocynanate ions to a solution The molarity of silver ion is 0.1M initially. Calculate the max concentration of SCN- ion that exists in the solution before AgSCN beings to precipitate? ?

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Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.

### Chemistry

Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.