Number of results: 13,938
1) When we say calcium reacts readily with cold water, it means the reaction is moderately fast? 2) When we react Fe with dilute HCl, we get FeCl2 & H2. Why won't we get FeCl3? 3) Similarly, when we react Fe with CuSO4, displacement reaction occur to give FeSO4 & Cu. Why won't...
January 31, 2009 by candy
Which of the following samples will react completely with 20.0 mL of 0.200 M LiOH 10.0ML of 0.100 M HCL 10.0mL of 0.200 M H2SO4 10.0mL of 0.100 M HNO3 20.0mL of 0.200 M H3PO4 20.0mL of 0.100 M HBr How do I do this problem??
September 26, 2009 by Nisha
A 2.800-g mineral sample was analyzed for its calcium carbonate, CaCO3, content by titrating it with hydrochloric acid (the reaction products are calcium chloride, carbon dioxide, and water). The sample required 28.48 mL of a 0.1505 M HCl solution to react completely. ...
November 28, 2010 by Anonymous
Find the components of the unit vector that makes an angle of 210 degrees counterclockwise with the positive x-axis (-√3/2,-1/2) which would be the same as (cos 210º,sin 210º)
April 16, 2007 by Alejandro
HCl - Chem
Assume you had a very magnified view of a solution of HCl that allowed you to "see" the HCl. Draw this magnified view. If you dropped in a piece of magnesium, the magnesium would disappear and hydrogen gas would be released. Draw this out using symbols to represent the ...
January 13, 2007 by Gil
how wold you prepare 2.00L of 1.00M HCl solution using 6.00 M HCl? i already found the volume of 6.00M HCl needed to be .333L. i am confused about how to actually prepare the solution. do i used a volumetric flask or any other glassware?
February 26, 2011 by lindy
Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)
November 13, 2012 by Brit
Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of grams of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)
November 13, 2012 by Brit
Im stuck on these few questions that seems to be getting me no where : -Determine the number of mmoles of HCl that did not react with the anatacid. c HCl = 0.1812 c NaOH = 0.1511 volume of HCl added : 75 volume of NaOH added: 29.23,19.58,33.3 - mmoles of HCl neutralized by the...
October 8, 2013 by karen
Im stuck on these few questions that seems to be getting me no where : c HCl = 0.1812 c NaOH = 0.1511 volume of HCl added : 75 volume of NaOH added: 29.23,19.58,33.3 -Determine the number of mmoles of HCl that did not react with the anatacid. - mmoles of HCl neutralized by the...
October 8, 2013 by kathy
I need to design a method to separate a mixture of benzoic acid and caffeine based on the results of a solubility experiment I did and Im not sure where to start. Ok, I know that the caffeine acts as a base as it was soluble in HCL and the Benzoic acid is an acid as it was ...
September 19, 2007 by AMY
When zinc metal is reacted with hydrochloric acid, zinc chloride and hydrogen gas are produced. If 16.4 ml of 2.14 M HCl are used: a) how many grams of zinc metal are needed to completely use up the acid? b) What will be the molarity of the aqueous product? Please show all ...
December 7, 2011 by Lindsay
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...
October 18, 2010 by Akhed
Dilution calculation: use the formula M1V1=M2V2 How many milliliters of 12 M HCl would be needed to make 200 mL of a 1.0 M HCl solution? I got 16.67 mL HCl for this part but there's a secondary question. It says: How much water would be used to make this solution? I have no ...
May 4, 2010 by Ana
1.8 mol Zn and 7.3 mol HCl react according to the equation Zn + 2 HCl −→ ZnCl2 + H2 . If the limiting reactant is Zn, calculate the amount of ZnCl2 formed. Answer in units of mol
January 22, 2013 by Morgan
In the theoretical reaction 2 B(aq) + 3 D(aq) ---> E(aq) + 4 F(aq) the concentration of D(aq) is 0.40 mol/L. If 25.0 mL of aqueous B is needed to react completely with 30.0 mL of aqueous D, the concentration of B(aq) is A-0.48 mol/L B) B-0.32 mol/L C) C-0.40 mol/L D) D-0.72...
October 22, 2012 by mem
dry gaseous hcl contained in volume of 1L at STP is dissolved in 200ml of 0.5M barium hydroxide soltion. How many mol of 0.5M hcl would be needed to neutralise the resulting solution?
April 2, 2012 by mob
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?
September 11, 2011 by Dave
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?
September 12, 2011 by BillyBob
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?
September 13, 2011 by Carolina
In a thermochemistry experiment the reaction of 0.0857 g of an unknown metal and an excess of 4.0 M HCl resulted in a 0.210 mL decrease in the volume of an ice/water mixture. Calculate the enthalpy of this reaction per 1 g of metal reacted. Needed data: density of water at 273...
December 1, 2007 by Raj
Gasahol is a fuel containing ethanol(C2H6O) that burns in oxygen (O2)to give carbon dioxide and water. a)How many moles of O2 are needed to completely react with 4.0 moles of C2H60? b) If a car produces 88g of CO2,how many grams of O2 are used up in the reaction? c)If you add ...
March 17, 2011 by Connie
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?
March 16, 2014 by Selina
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 ...
August 1, 2013 by Kris
A prescription calls for 250ml of a 0.1N hydrochloric acid HCL solution. How many ml of concentrated hydrochloric acid are needed to make this solution? The specific gravity hydrochloric acid is 1.18 the molecular weight is 36.46 and the concentration is 37.5% because ...
July 29, 2012 by Fai
f 27.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 32.40 mL of 0.185 M HCl, what is the concentration of the Ca(OH)2 solution? Show all of the work needed to solve this problem. Ca(OH)2 + 2 HCl 2 H2 O + CaCl2.
June 13, 2011 by Johnny
Chem simple question
how many mL of .135M Sr(OH)2 are needed to neutralize 35ml of .157M HCL I know the answer came out to 20.4 ml My only question is how do I convert HCL to Sr(OH)2
September 29, 2013 by Julie
3Ca(NO3)2(aq)+2Na3PO4(aq)->Ca3(PO4)2(s)+6NaNO3(aq) A.)the moles Na3PO4 required to react with 2.03 L of 0.891 M Ca(NO3)2 B.)the grams of Ca3(PO4)2 that can be obtained from 136 mL of 0.627 M Ca(NO3)2 C.)the volume of 0.76 M Na3PO4 needed to react with 25 mL of 0.79 M Ca3(...
December 10, 2010 by Anonymous
a volume of 50mL of a standard HCl solution is needed to neutralize 50 mL of 1x10-2 M NaOH. what volume of this HCl solution is needed to neutralize 50 mL of 1x10-2 M Ba(OH)2
May 3, 2010 by Bianca
You react chemical A with chemical B to make one product. It takes 100 grams of chemical A to react completely with 20 grams of chemical B. What is true about the chemical properties of the product? a. the properties are more like those of chemical A b. the properties are more...
February 13, 2012 by student
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 ...
October 18, 2010 by Akhed-To DrBob222
How many milliliters of 0.710 M HCl are required to react with 47.80 grams of CaCO3 ? Given the balanced reaction equation: 6 FeCl2(aq) + K2Cr2O7(aq) + 14 HCl(aq) 6 FeCl3(aq) + 2 CrCl3(aq) + 2 KCl(aq) + 7 H2O(l) How many moles of FeCl2(aq) are required to produce 2.811 mol of ...
November 28, 2010 by Lena
Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer? 1) 210.10 g+235.100g 2)210.100 g + 235.10 g 3) 210.1 g + 235.1 g 4) 210.10 g+ 235.10 g I think the answer is 2 but I don't know the reason why.
November 6, 2008 by Joanne
Calcium nitrate and ammoonium fluoride react to form calcium fluoride, dinitrogenmonoxide and water vapor. What mass of each substance is present after 28.42 g of calcium nitrate and 29.60 g of ammonium fluoride react completely?
October 26, 2009 by Brittany
While standing on a frictionless ice surface, a 50 kg skater pushes against a wall with an average force of 150 N west for 0.210 s. Calculate the velocity of the skater at 0.210 s. This was what i did: m = 50 kg Fnet = 150 N t = 0.210 s Vf =? Fnet = ma Fnet/m = a 150 N/50 kg...
March 28, 2011 by bram
"The percentage of sodium hydrogen carbonate, NaHCO3, in a powder for stomach upsets is found by titrating .275 M hydrochloric acid. if 15.5 mL of hydrochloric acid is required to react with .500 g of the sample, what is the percentage of sodium hydrogen carbonate in the ...
October 19, 2006 by Dan
What mass (g) of magnesium chloride (MgCl2) must react with sulfuric acid (H2SO4) to release 890.2 ml of Hydrogen chloride (HCl) gas at STP according to the following equation? Round to one decimal place. MgCl2 (s) + H2SO4 --> MgSO4 (aq) + 2 HCl
April 8, 2013 by Linzy
A chemical engineer calculated that 15.0 mol H2 was needed to react with excess N2 to prepare 10.0 mol NH3. But the actual yield is 60.0% . Write a balanced chemical equation for the reaction. Is the amount of H2 needed to make 10.0 mol NH3 more than, the same as, or less than...
January 2, 2013 by Anonymous
ANTACID TABLET OF WEIGHT 1.3183G WAS DISSOLVED IN 75 MLOF CONC. HCl OF 0.1807M IS TITRATED WITH 20.36ML OF CONC. NaOH OF 0.1481M . FIND MILIMOLES OF HCl ADDED, FIND MILIMOLES OF NaOH USED IN TITRATION, FIND MILIMOLES OF HCl THAT DID NOT REACT WITH ANTACID, FIND MILIMOLES OF ...
October 16, 2011 by Anonymous
Use the equation below to answer the questions that follow. Br2 + Cl 2 ⎯→ 2BrCl a. How many moles of BrCl form when 2.74 mol Cl2 react with excess Br2? b. How many grams of BrCl form when 239.7 g Cl2 react with excess Br2? c. How many grams of Br2 are needed to ...
June 2, 2010 by Kyree
1) Does Alumnium react with steam to give metal oxide and hydrogen gas? 2) Does Aluminium react with dilute hydrochloric acid? What are the products? 3) Will Tin react with dilute hydrochloric acid to give tin(II)chloride and hydrogen gas?
January 28, 2009 by anne
1) If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) +C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq) 2) If 8,00 mol of NH3 reacted with 14.0 mol of O2, how many moles of H20 will be produced? 4NH3(g...
May 4, 2011 by shaquifa
5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) --> HCa + Cl(OH)2 (B) HCl + Ca(OH)2 --> H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 --> 2H2O + CaCl2 (D) 2HCl + Ca(OH)2 --> H2Ca + 2ClOH...
October 16, 2013 by CJ
Hello! I am having a little difficulty answering these two questions on my homework, I was wondering if anyone could please help me out! Thank you! 1) Consider the following balanced chemical equation for the neutralization reaction of calcium hydroxide with hydrochloric acid ...
November 30, 2013 by T.C.
the balance equation for the reaction of aqueous sulfuric acid with aqueous ammonia is 2NH3(aq)+ H2SO4(aq) -> (NH4)2SO4(aq) 1. what volume of 0.250M sulfuric acid solution would be needed to react completely with 18.00mL of 0.350M ammonia solution? 2. what mass of ammonium ...
April 15, 2014 by Jen
please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples: 1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M HCl solution? 2. You wish to determine the molarity of a solution of ...
October 2, 2008 by chris
Please help me with these! Thanks :) Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a 45.0 percent by mass ...
February 27, 2011 by Amanda
the concentration of HCl, a strong acid is 0.500 M. if 20.0 ml HCl is needed to titrate 40.0 ml of NaOH, what is the concentration of NaOH Help me please. I'm confused by this
April 26, 2012 by Jessie
Sorry DrBob, it's me again! 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 added:(0.1845M x 75.0mL= 13.84 mmoles 4.Volume of NaOH used: 17...
October 18, 2010 by Akhed-To DrBob222
For each of the following unbalanced equations, suppose that exactly 15.0g of each reactant is taken. Determine which reactant is limiting, and calculate what mass of each product is expected. assume the limiting reactant is completely consumed. a)Al+HCL->AlCl3+H2 b)NaOH+...
February 16, 2009 by Megan