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April 24, 2014

Search: What minimum mass of HCl in grams would you need to dissolve a 2.5g iron bar on a padlock?

Number of results: 27,087

Chemistry 151
5) How many mL of 1M HCl is used to make the following dilutions? a) 100mL of 0.1M HCl = b) 250mL of 0.5M HCl= c) 10ml of 0.01M HCl= 36.64 is the molar mass of hcl do I divide that into ml?
Sunday, March 16, 2014 at 5:18pm by Selina

chemistry
I have a 0.25 m aquaeous solution of HCL. It's density is 1.05 g/ml. WHat is the % by mass (m/m) of this solution? What is the molarity of the solution? define molality. m = # mols/kg solvent. We have 0.25 m so we must have 0.25 x 36.5 g/mol HCl = 9.125 g HCl/1000 g solvent. ...
Tuesday, March 20, 2007 at 9:26pm by nancy

chemistry
What minimum mass of HCl in grams would you need to dissolve a 2.5g iron bar on a padlock?
Wednesday, May 25, 2011 at 7:37pm by Anonymous

science
How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? 1. Write the balanced chemical equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert grams Zn to mols. mols = grams/atomic mass Zn. 3. Using the ...
Saturday, March 17, 2007 at 10:58pm by Josh

Chemistry
Hi, Please provide assistance on the following problem. I worked out part of it, but do not know what to do after calculating pH for HCl. Suppose you dissolved 0.0365 grams of HCl in water to give a final volume of 10.0 mL. The molar mass of HCl is 36.5 g/mole and the molar ...
Monday, March 19, 2012 at 12:00am by Jeremy

Science
Al(OH)3(s) + HCl(aq) AlCl3(aq) + H2O(l) How many moles of HCl are required to react with 0.470 g of Al(OH)3 in the above unbalanced reaction? Use at least as many significant figures in your molar masses as in the data given. mol HCl What mass of HCl is required? How many ...
Wednesday, November 16, 2011 at 8:57pm by Megan

chem
I can't seem to figure this out! I know I have to use mass to mass conversions though. Can someone help me out? Hydrochloric acid can dissolve solid iron according to the following equation: Fe + 2HCl to form FeCl2 + H2 a) How much HCl in grams would you need to dissolve a 2.8...
Thursday, March 1, 2007 at 6:20pm by Abby

Chemistry - titration lab
Hello. For my chemistry of solutions class, we had a titration lab where we titrated NaOH into an HCl + H2O mix. This was a preparatory titration for the next one consisting of the hydrolysis of ethyl acetate into acetic acid with H+ ions as a catalyst (in our case the HCl). ...
Tuesday, July 31, 2012 at 11:42am by Robertq

chemistry
what volume of a concentrated HCl solution which is 36% HCl by mass and has a density of 1.179g/ml should be used to make 5.30L of an HCl solution with a pH of 1.8?
Monday, February 11, 2013 at 4:22am by Anonymous

chemistry
What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 4.60 L of an HCl solution with a of 1.9? HELP!!!
Monday, December 6, 2010 at 1:13pm by Stacy

Chemistry
4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl (in mL) neutralized by...
Tuesday, April 2, 2013 at 9:53pm by Josh

chemistry
10). What is the molarity of an HCl solution if 42.5 mL of a 0.110 M KOH solution is needed to titrate a 25.0-mL sample of the acid? A) 0.187 M HCl B) 0.587 M HCl C) 0.0647 M HCl D) 5.35 M HCl E) 1.70 M HCl
Monday, November 28, 2011 at 5:50am by denis

chem
Commerical hydrochloric acid is 37% by mass HCl and has a solution density of 1.18g/mL. What minimum volume of hydrocloric acid is needed to dissolve 16g Al. The balanced equation is 2Al + 6Hcl --> 2AlCl3 + 3H2
Wednesday, November 21, 2007 at 1:17pm by Anonymous

analytical
I have 5ml of 0.07 mol/l Hcl I want to increase the molarity to 1 mol/l by adding minimum volume of hcl 31.2% density 1.15 kg/l how much I have to add
Tuesday, May 14, 2013 at 1:40am by nebal

Chemistry
Chemical analysis show that hemoglobin contains 0.34 percent Fe by mass. What is the minimum possible molar mass of hemoglobin? The actual molar mass of hemoglobin is four times this minimum value. What conclusion can you draw from these data?
Wednesday, November 2, 2011 at 11:16am by Amber

chem
how would you prepare 445 grams of solution containing 13% mass HCL from 34.1 mass % of HCL solution
Monday, February 24, 2014 at 5:32pm by SDW

Chemistry
A sample of impure magnesium was analyzed by allowing it to react with excess HCl solution: Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) After 1.27 g of the impure metal was treated with 0.100 L of 0.768 M HCl, 0.0125 mol HCl remained. Assuming the impurities do not react, what...
Sunday, September 22, 2013 at 10:28pm by James

Chemistry
1.600g of a metallic oxide of type MO were dissolved in100mL 1.0M HCl. The resulting liquid was made up to 500mL with distilled water. 25.00mL of the solution ,then required 21.02mL of 0.1020 M of NaOH for neutralization. Calculate the mass of the oxide combining with 1 mole ...
Friday, March 7, 2014 at 11:36pm by Dash

Chemistry
Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 5.3 g of iron are to be dissolved in 1.7 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?
Sunday, September 11, 2011 at 11:50pm by Dave

Chemistry
Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 6.5 g of iron are to be dissolved in 1.4 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?
Monday, September 12, 2011 at 3:12pm by BillyBob

chemistry
Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 5.4 g of iron are to be dissolved in 1.1 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?
Tuesday, September 13, 2011 at 5:25pm by Carolina

Chemistry
a 110 g solid sample that is a mixture of CaCO3 and CaCl2 is reacted with 1.50 L of 1.45M HCl. Of the calcium salts, only calcium carbonate reacts with HCl- the reaction forms CaCl2 and CO2. The excess/unreacted HCl requires 0.850 L of 0.543 M NaOH to titrate it to the ...
Monday, December 3, 2012 at 10:31pm by Cristian

chemistry
how many grams of H2 (g) are produced by the reaction of 1.35 g Al with 75.0 mL of 3.44 M HCl Here is the way to do most of these stoichiometry/limiting reagent type problems. Step 1. Write a balanced chemical equation. 2Al + 6HCl ==? 3H2 + 2AlCl3 Step 2. Convert what you have...
Sunday, September 24, 2006 at 9:06pm by brian

Chemistry
How many mL of concentrated HCl (aq) (36.0% HCl by mass, d=1.18 g/mL are required to produce 5.00 L of a solution with a pH =2.10?
Sunday, March 11, 2012 at 7:28pm by Maddie10

chemistry
I need help Calculating the mass of HCL neede to react with 20.0 grams Zn. Zn+HCL -> ZnCl2+H2
Monday, February 9, 2009 at 6:50pm by Natalie

Biochem
10ml of HCl acid titrate with 9.9ml of NaOH. What is the mass in grams of HCl?
Tuesday, August 3, 2010 at 5:04pm by Amrik

chamistry
how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?
Wednesday, February 23, 2011 at 10:15pm by franco

chemistry
Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl.
Thursday, May 3, 2012 at 8:16pm by alexandrea

chemistry
What is the molarity of a solution that contains 31.0 HCl in 5.00kg water? (molar mass of HCl=36.46 g/mol)
Sunday, January 22, 2012 at 8:47pm by jim

chemistry
Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl. H 1.01 Hydrogen 17 Cl 35.45 Chlorine
Monday, September 26, 2011 at 2:59pm by archie

CHemistry- For Dr.Bob
Hey Dr.Bob, I asked two days ago a question about a titration lab I had that you answered, but I still have one more question about that lab. Here's the lab summary: For my chemistry of solutions class, we had a titration lab where we titrated NaOH into an HCl + H2O mix. This ...
Thursday, August 2, 2012 at 6:01pm by Robert

chem2
A small piece of zinc is dissolved in 22.29 mL of 0.968 M HCl. Zn (s) + 2 HCl (aq) ----> ZnCl2 (aq) + H2 (g) At the end of the reaction, the concentration of the 22.29-mL sample is redetermined and found to be 0.691 M HCl. What must have been the mass of the piece of zinc ...
Monday, September 22, 2008 at 3:01pm by fru

Ap Chemistry.
Zn + 2HCl -> ZnCl2 + H2 If 7.29 g of Zinc reacted, how many liters of HCl were used? I know that i can't use mass volume conversion, because the HCl is not a gas...so what do i do?
Monday, October 25, 2010 at 8:00pm by Chris

algebra
1. How to find the numbers, if there are any, at which f has a realtive minimum. What is the realive minima? The graph that I have looks like W, it has point at -1 on the x axis, 1 on the y axis, and 1 on the x axis. Choices that I have: a. f has a relative minimum at x=0; the...
Saturday, September 1, 2007 at 4:12pm by Josie

chemistry
Aluminum metal generates H2 gas when dropped into 6.00 M HCl. Calculate the mass of H2 that will form from the complete reaction of 0.365 g Al with 8.40 mL of 6.00 M HCl.
Thursday, January 26, 2012 at 7:49pm by annie

chemistry
how many mL of 1M HCL is used to make: 100mL of 0.1M hcl 250Ml OF 0.5M hcl 10Ml OF 0.01m hcl
Saturday, March 29, 2014 at 12:21am by Tammy

Chemistry
We did a lab to find the atomic mass of Magnesium. We used an eudiometer and HCL and a mg ribbon. Explain in terms of moles, limiting reactants and experimental feasibility, why we use concentrated HCl (12M) instead of 1M or 6M?? Would the calculated atomic mass be higher, ...
Monday, June 25, 2012 at 10:20pm by Denise

Chemistry
1) Prepare 100mL of 10%w/w HCl from 37%concentrated HCl(density of 37%HCl =1.19g/ml) 2) Prepare 100mL of 10%w/v HCl from 37% concentrated HCl(density of 37%HCl=1.19g/ml) Can you please show the calculation steps for 1) & 2)? Is 10%w/v HCl the same as 10%w/w HCl? Thanks.
Monday, March 12, 2012 at 10:24am by Annie

Chemistry
I had conducted an experiment to figure out the percent by mass of baking soda in a mixture by titration. I had to standardize 1.0M HCl. Through the standardization process and the titration curve of the primary standard and the HCl, the molarity has to be found, but is this ...
Sunday, April 13, 2014 at 7:27pm by Sandy

chemistry
Question about titration calculations in analysis of antacids lab. We did a lab yesterday with antacids, HCl and NaOH and I'm having trouble doing the calculations. The information known is the following: 1)0.10M NaOH 2)0.10M HCl 3)Mass of Antacid .22g 4)Volume of NaOH ...
Thursday, March 11, 2010 at 5:52pm by Mindy

Chemistry
How many mL of concentrated HCl(aq) (36% HCL by mass, d=1.18g/mL_ are required to produce 12.5 L of a solution with ph = 2.10? First I started with finding out the concentration of [H30+] and for that I got 7.94 x 10^-3 but I don't know how to continue.
Tuesday, June 7, 2011 at 6:32pm by K

chemistry
Okay so I did this problem, but it seems wrong? I put the answers I got... Determine the pH of the following tiration at each of the points indicated. A 71.7 mL solution of 0.182 M NaOH is titrated with 0.2086 M HCL. 1.) initial pH= is it 7.86 or 8.51? 2.) after addition of 10...
Sunday, October 9, 2011 at 12:57pm by help meeee pleaaseee

science
Posted by Josh on Saturday, March 17, 2007 at 10:58pm. How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? For Further Reading science - DrBob222, Saturday, March 17, 2007 at 11:07pm 1. Write the ...
Sunday, March 18, 2007 at 2:37am by Josh

Grade 12 chemistry
This is the second reaction: HCl(aq)+NaOH(aq)-->NaCl(aq)+H2O(l) (Heat of neutralization) This reaction involves mixing two solutions: 1.00 mol/L NaOH and 1.00 mol/L HCl. Trial 1: 48.0 mL of the NaOH solution is mixed with 47.5 mL of the HCl. The temperature rises from 22.00...
Sunday, January 1, 2012 at 11:08pm by tessa

Chemistry
A 0.450-gram sample of impure CaCO3(s) is dissolved in 50.0 mL of 0.150 M HCl(aq). The equation for the reaction is: CaCO3(s)+2HCl(aq) -> CaCl2(aq) + H2O(l) + CO2(g) The excess HCl(aq) is titrated by 9.75 mL of 0.125 M NaOH(aq). Calculate the mass percentage of CaCO3(s) in ...
Tuesday, April 10, 2012 at 2:41am by Katherine

chemistry
Hello. In the class, we did the experiment to calculate the value of Kc for the following reaction: CH3COOH+CH3CH2OH CH3COOCH2CH3+H2O we measured the mass for 5 cm^3 of all 5 compound above: CH3COOH 5.236 g CH3CH2OH 4.021 g CH3COOCH2CH3 5.020 g H2O 5.020 g HCl 5.098 g when ...
Saturday, November 1, 2008 at 4:28pm by masaya

chem
HCl is a strong acid and ionizes 100%. NaOH is a strong base and ionizes 100%. We have no way of knowing the pH of HCl + H2O because the problem doesn't state the amount of HCl added or the concentration of HCl. For the NaOH + HCl ==> NaCl + HOH. NaCl in water is a neutral ...
Tuesday, May 15, 2007 at 5:10pm by DrBob222

Chemistry
What minimum amount of 1.55 M \rm HCl is necessary to produce 26.5 L of \rm H_2 at STP?
Wednesday, May 16, 2012 at 12:12pm by Tj

Chemistry
Given HCL + SrO --- SrCL2 + H20 Calculate the mass of HCl in grams that would react with 4.85 kg SrO.
Thursday, November 17, 2011 at 1:18pm by nms

chemistry
anyone help me . .what volume of concentrated HCL solution whoch is 36% by mass and has a density of 1.179 g/ml , should be used to make 4.7 L of hcl solution with a pH of 1.8 ?
Wednesday, February 13, 2013 at 8:30am by m

chemistry
What volume of a concentrated hcl solution which is 36% by mass and has a density of 1.179 g/ml to make 4.85L of an hcl solution with ph of 1.9? Who helps me to solve it for me.
Saturday, August 4, 2012 at 10:31pm by Fai

Chemistry
Given the following reaction: HCl(g) + SrO(s) SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 11.44 kg SrO.
Thursday, November 25, 2010 at 9:29pm by andrea

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
Wednesday, May 11, 2011 at 10:29pm by Daniel Forero

Chemistry
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2 (g) DeltaH= -4.6x10^2 kJ How much heat is evolved when 0.598 g of Mg are dissolved in excess HCl? I'm not sure how to go about this problem. What I thought to do was: 0.598 g x 1 mol Mg/24.31 g Mg x 2 mol HCl/ 1 mol Mg x 36.46 g HCl/ 1 ...
Wednesday, November 3, 2010 at 11:45pm by Jarrod

Chemistry
Mg+ 2HCl-->MgCl2+H2 The mass of the HCl is 24.852 g mass of the Mg is .990 g and the mass of the calorimeter is 3.711 g. How do I calculate the heat of the reaction of all this please?
Monday, April 26, 2010 at 10:30pm by Kevin

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
Wednesday, May 11, 2011 at 10:40pm by Daniel Forero

chemistry
Given the following reaction: HCl(g) + SrO(s) → SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 7.70 kg SrO
Monday, November 14, 2011 at 12:52pm by riali

Pharmacy math
How much dil HCL (10% w/w) HCL specific gravity = 1.045 would be required to prepare 2000ml of a solution containing 0.005 molar HCL? HCL m.w.t = 36.5 Who try to solve for me. Please help The right answer is 34.9ml
Saturday, July 28, 2012 at 9:05pm by Fai

Chemistry
What is the minimum volume of 6.5M HCl required to completely dissolve 24.0g of magnesium metal?
Thursday, November 17, 2011 at 12:54pm by Lorena

Chemistry
Suppose 1 gram of Li2CO3 is reacted with in 50.0 mL of 3.00 M HCl. What would be the mass of CO2 liberated in the reaction? After the reaction, how many moles of HCl are left over?
Sunday, October 7, 2012 at 10:54pm by Anonymous

Chemistry
Instead of a strip of pure Mg ribbon, you are accidentally given a strip of an aluminum-magnesium alloy. You calculate the mass of the strip as above. Would the mass of the strip be higher or lower than expected? Write the appropriate chemical equations (one equation for the ...
Monday, April 8, 2013 at 11:59am by Kate

Chemistry
What are the balanced equation for the following reactions: HCl and Sodium Hydrogen Carbonate HCl and Copper oxide HCl and Calcium carbonate HCl and Magnesium NaOH and Ammonium Chloride
Tuesday, March 9, 2010 at 2:55pm by Abigail

Chemistry
How do I prepare 100mL of 10g/L HCl from concentrated HCl(37%HCl, density 1.19g/mL) Is it 2.28mL of conc HCl dilute to 100mL with water? Please show the calculation steps.
Thursday, February 16, 2012 at 9:51am by annie

chemistry
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation Mg(s) + HCl(aq) −! MgCl2(aq) + H2(g) . What mass of HCl is consumed by the reac- tion of 2.96 mol of magnesium? Answer in units of g
Saturday, February 23, 2013 at 1:22pm by Anonymous

chemistry
ten mols of metallic iron was dissolved in concentrated HCl.what is the balanced chemical equation? a) what is the mass of each product that formed? b) what amount of HCl was used in this reaction? need help in those three questions please......
Thursday, November 11, 2010 at 5:18pm by tarkan

Chemistry
For the reaction NaOH + HCl---> H20 + NaCl where the mass of NaOH is 2g and the Volume of Hcl is 100ml with a 0.5 concentration. The initial temp is 25 and the final is 35, what is the amount of energy absorbed by the solution?
Tuesday, May 4, 2010 at 4:32pm by Hyde

chemistry
What is the minimum volume of 2.00 M HCl necessary to neutralize completely the hydroxide in 800.0 mL of 0.3 M NaOH?
Wednesday, November 28, 2012 at 11:45pm by carol

Chemistry
Could someone please help me complete my lab experiment. Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl added:mmoles ? Help 4.Volume of NaOH used: 17.14 mL...
Monday, October 18, 2010 at 8:13pm by Akhed

Chemistry
For the reaction NaOH + HCl---> H20 + NaCl where the mass of NaOH is 2g and the Volume of Hcl is 100ml with a concentration of 0.5 mol/l. The initial temp is 25 and the final is 35, what is the amount of energy absorbed by the solution?
Tuesday, May 4, 2010 at 5:10pm by Hyde

Chemistry
What is the minimum amount of 1.75 m of HCL necessary to produce 28.5 L of H2 at stp? EQUATION IS AS FOLLOWS: Mg+2HCL->>MgCl2+H2
Wednesday, November 17, 2010 at 7:14pm by Ricardo

Physics
What minimum sized balloon would you have to fill in order to be able to be lifted into the air? Take your mass to be 100 kilograms and the temperature of the outside air to be 20 degrees C. Neglect the mass of the balloon rubber and basket and assume that the balloon is ...
Friday, March 15, 2013 at 4:07pm by steve

Chemistry - Acid Base Titration
When you complete a acid base titration of NaOH and HCl and how to you find the molarity/concentration of HCl. I used 9 mL of HCl with 50 mL of water. But when solving for concentration, do I use 9 mL or 59 mL (water + HCl)? Also, does the water in the HCl affect the outcome ...
Thursday, January 31, 2008 at 8:27pm by Steve

Chemistry
How does the molar mass of molecules affect the boiling points? e.g MOlar masses HI-->127.9 HF--->20.07 HCl---> 36.45 Boling points HI-->-35.55 HF---> 20 HCl--->-114.17 can it be said that except for HF molecule, as molar mass increases the boling points alos...
Saturday, March 27, 2010 at 4:46pm by LALA

chemistry
What mass of K2CO3 is required to clean up a spill of 339 ml of 2.65 M HCl if HCl(aq) reacts with K2CO3 according to 2HCl(aq) + K2CO3(aq) 2KCl(aq) + CO2(g) + H2O(l)?
Sunday, June 3, 2012 at 8:05pm by Anonymous

AP Chem
What mass of K2CO3 is required to clean up a spill of 282 ml of 1.05 M HCl if HCl(aq) reacts with K2CO3 according to 2HCl(aq) + K2CO3(aq) → 2KCl(aq) + CO2(g) + H2O(l)?
Wednesday, February 9, 2011 at 8:57pm by Sky

chemistry
CaCO3(s) + 2 HCl(aq) --> CaCl3(aq) + H2O(l) + CO2 It takes 19.26 mL of 0.6721 M HCl to completely react with the CaCO3. What is the mass of CaCO3 in the tablet? didnt mean to cal you
Sunday, November 11, 2012 at 8:01pm by Sheree'

chemistry
Hydrochloric acid is usually purchased in concentrated form with a 37.0% HCL concentration by mass and a density of 1.20g/mL. How much of the concentrated stock solution in milliliters should you use to make 2.5L of 0.500M HCL
Sunday, November 6, 2011 at 1:16am by Monique

Chemistry
How much concentrated solution would you take to prepare 2.80L of 0.475M HCl by mixing with water? Hydrochloric acid is usually purchased in a concentrated form that is 37.0% HCl by mass and has a density of 1.20g/mL.
Thursday, February 21, 2013 at 8:26pm by M J

Chemistry (heat flow, simple)
Well I know to calculate heat flow you use, q=ms delta t. for this experiment we mixed naoh with hcl into water. the total mass (volume) of the mixture was 100g the temperature change for naoh was 11.7 degrees C and for hcl it was 11.8 degrees C now im looking to calculate ...
Friday, March 12, 2010 at 8:00am by Abdullah

Chemistry
Manufacturing of Freon (CCl2F2): 2 HF(g) + CCl4(I) --> CCl2F2(g) + 2 HCl(g) Supplies on hand: 1.0kg HF and 1.0 kg CCl4. After the reaction was conducted, 0.44kg CCl2F2 was measured in the lab. 1) What is the theoretical yield of Freon? 2) What was the percent yield? 3) What...
Friday, November 19, 2010 at 4:24pm by Kathy

chemistry
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
Monday, April 26, 2010 at 5:26pm by Zoe

CHEMISTRYYY
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
Monday, April 26, 2010 at 5:58pm by Justin

Chemistry
A sample of 0.0020 mole of HCl is sissolved in water t omake a 2000ml solution. Calculate the molarity of the HCl solution, the (H30+) and the pH. For a strong acide such as HCl the (h30+) is the same as the molarity of the HCl solution. HCl +H20 Balanced equation H30+ +Cl
Wednesday, December 1, 2010 at 10:35am by Susie

chemistry
Q1) 5 liters of Butane gas (C4H10) is reacted with plenty of oxygen at 27 oC and 1 atm to produce carbon dioxide and water vapor. Calculate the following: 1- The volume of CO2 produced at 1 atm and 400 oC. 2- The mass of H2O vapor produced. 3- The mol % of the products. Given...
Monday, November 2, 2009 at 9:42pm by David

chemistry
The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.4. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq). (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition...
Thursday, April 4, 2013 at 1:05pm by Ashley

Chemistry
1) The molecular mass of a substance was determined by the freezing point depression technique. The minimum data required for the determination are a. Tf and Kf only. b. Tf , Kf and mass of solute. c. Tf , Kf , mass of solute and mass of solvent. d. Tf , Kf , mass of ...
Monday, February 13, 2012 at 1:59pm by Hannah

Chemistry
Sorry DrBob22, I wasn't sure if you saw my last post. But, I am still a little confused. Here's the info: Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl ...
Monday, October 18, 2010 at 10:04pm by Akhed-To DrBob222

Chemistry
I have liquid concentrated HCl (37%w/w) To prepare 100ml of 10g/L HCl as a solvent medium, is it acceptable to just weigh 1g of liquid conc HCl and dilute to 100ml with water? What volume of conc HCl should we use to make 100ml of 10g/L HCl?
Monday, May 28, 2012 at 3:28pm by anne

AP Chem
When NH3 gas is introduced at one end of a long tube while HCl gas is introduced simultaneously at the other end, a ring of white ammonium chloride is observed to form in the tube after a few minutes. This ring is closer to the HCl end of the tube than the NH3 end. Why? I am ...
Tuesday, January 23, 2007 at 9:56pm by Belinda

chemistry
can u pls identify which has the greater activation energy. A cube of Fe reacting with 20mL, 1.0mol/L HCl or powdered Fe, having a the same mass, reacting with 20mL,1.0 mol/L HCl
Monday, May 16, 2011 at 8:47pm by loulou

physics
A block with a mass of 0.5kg is pushed against a horizontal spring of negligible mass and spring constant 450 N/m until the spring is compressed a distance x. When it is released, the block travels along a frictionless, horizontal surface to the bottom of a verticle circular ...
Wednesday, March 28, 2012 at 2:13am by natasha

Chemistry
A volume of 150mL of 0.35M HCl is to be prepared from 80% HCl stock solution. (Density of HCl = 1.191g/mL). Calculate the molarity of 80% HCl stock solution.
Friday, August 9, 2013 at 1:37pm by K

Chemistry
We conducted a lab with antacids in class the other day and i'm having trouble doing the calculations. Well we basically took antacid tablets dissolved them in HCl, heated it and then added phenolthalien and then titrated until we saw a pink color. At 41mL we saw the pink and ...
Monday, March 15, 2010 at 8:48am by Anonymous

Chemistry
So I am writing a lab report and Im stuck with calculating the enthalpy change of combustion of the following reaction: Mg+2HCl--> MgCl2+H2 .I am given the mass of Mg which is 5g and the concentration of HCl which is 2M and the volume of HCl which is 50 cm^3.I found the ...
Saturday, April 30, 2011 at 1:57pm by Ashley

AP CHEMISTRY
Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows. Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (Cu does not react with HCl.) When 0.5093 g of a certain brass alloy is reacted with excess HCl, 0.0953 g ZnCl2 is eventually isolated. (a) What is the ...
Thursday, August 1, 2013 at 5:18pm by Kris

chemistry
What volume of 4.50M HCl can be made by mixing 5.65M HCl with 250 mL of 3.55M HCl?
Saturday, July 24, 2010 at 1:25am by casey

science
How many ml of concetrated HCl are required to make 2 liters of 3N HCl from concentrated HCl that is 37% w/v and has a specific gravity of 1.2. H=1 Cl=35.5
Tuesday, September 7, 2010 at 7:02pm by j

Chemistry
A 112 mL solution of 0.351 M HCl is added to 52.0 mL of 0.161 M HCl. What is the new concentration of HCl?
Thursday, October 21, 2010 at 5:11pm by Madison

Chemistry
Na₂CO₃ (s) + 2HCL (ag) → 2NaCl (ag) + CO₂ + H₂O (l) If 4.25g of sodium carbonate is reacted completely with excess hydrochloric acid as 3M HCl, how many mL of HCl would be consumed? Note: Assume 3M HCl contains 3.00 moles of HCl per liter of ...
Monday, April 30, 2012 at 2:07pm by Shelby

chemistry
HCl is titrated with NaOH. When doing the titration, some of the NaOH splashed onto the inside surface of the Erlenmyer flask, and you forgot to rinse it into your sample. Would the systematic error be falsely high, low, or unaffected and why? Thanks. As I understand the ...
Sunday, September 17, 2006 at 4:25pm by bria

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