Questions on Word Problems: Mixtures answered by real tutors!

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Question 719240: how many gallons of a sodium hypochlorite solution containing 5% available chlorine should be added to 50 gallons of water in a chlorine chemical solution tank to prepare a 200-mg/L solution of chlorine?
Click here to see answer by solver91311(24713)

Question 719270: how many gallons of hypochlorite would be pumped by a hypochlorinator if the hypochlorite solution is in a container with a diameter of 30 inches and and the hypochlorite level drops 21 inches during a specific time period?
Click here to see answer by solver91311(24713)

Question 719239: how many pounds of chlorine are needed to disinfect 100,000 gallons of water in a water storage tank at a chlorine concentration dose of 4 mg/L ?
Click here to see answer by solver91311(24713)

Question 719237: how many gallons of hypochlorite (5% available chlorine)have to be added to 100 gallons of water to produce a 120mg/L chlorine solution ?
Click here to see answer by solver91311(24713)

Question 719273: what is the desired strength (as a percent chlorine) of a hypochlorite solution being pumped by a hypochlorinator that delivers 80 gallons per day? the water being treated requires a chlorine feed rate of 10 pounds per day.
Click here to see answer by solver91311(24713)

Question 719305: what is the cost of 2/3 pound at $6.00 per pound
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Question 719401: Hi how much oil is needed for 5 litres of gas at 8% or 1:12? Thanks
Click here to see answer by rfer(16322)

Question 719463: A ticket booth sold 371 tickets and collected $1626.50 in ticket sales. Adult tickets are $5.50 and child tickets are $2.50. How many tickets of each type were sold?
Click here to see answer by mananth(16946)

Question 719353: a chemist has three different acid solutions. The first acid solution contains 20% acid, the second contains 30% and the third contains 75%. He wants to use all three solutions to obtain a mixture of 68 liters containing 50% acid, using 2 times as much of the 75% solution as the 30% solution. how many liters of each solution should be used?
Click here to see answer by josgarithmetic(39617)

Question 719586: How many liters of 80% alcohol solution must be added to 20 liters of 90% alcohol solution to produce 85% alcohol solution?
Click here to see answer by mananth(16946)

Question 719586: How many liters of 80% alcohol solution must be added to 20 liters of 90% alcohol solution to produce 85% alcohol solution?
Click here to see answer by jsmallt9(3758)

Question 719507: A mixture of 3% disinfectant solution is to be made from 6% and 2% disinfectant solutions. How much of each solution should be used if 24 gallons of 3% solution are needed?
Click here to see answer by jsmallt9(3758)

Question 719296: Pure acid is to be added to a 10% acid solution to obtain 126 L of a 20% acid solution. What amount of each should be used?
Click here to see answer by jsmallt9(3758)

Question 719409: A pound of dried pineapple bits sells for $6.19, a pound of dried banana chips sells for $4.29, and a pound of raisins sells for $2.79. Two pounds of raisins are to be mixed with equal amounts of pineapple and banana to create a trail mix that will sell for $4.99 a pound. How many pounds of pineapple and banana chips should be used? (Round your answer to the nearest tenth of a pound.)

Click here to see answer by jsmallt9(3758)

Question 719619: A 30% salt solution is prepared by mixing in 20% salt solution and a 45% salt solution. How many litres of each must be used to produce 60L of the 30 percent salt solution?
Click here to see answer by lynnlo(4176)

Question 719731: how many quarts of water must be added to 5 qt of 80% antifreeze solution to make 50 % antifreeze solution .
In my attempt
let x = # of quarts of water
0.80(X)+0.8(5) =0.50 solution not sure if this is correct
my answer was 5.625 quarts water
thank you
Click here to see answer by jsmallt9(3758)

Question 719764: I have a 100ml bottle and I have 37% alcohol I want to make a mixture of alcohol and water that is 25% alcohol to water what is the ratio and how do I go about working it out?
Click here to see answer by lwsshak3(11628)

Question 719732: A chemist mixes an 11% acid solution with a 4 % acid solution . How many milliters of each solution should the use to make a 700ml solution that is 6% acid ?
thank you
Click here to see answer by lwsshak3(11628)

Question 719832: A 50% solution is added to a pure solution to get 40g of 60% solution/ How much pure solution is used.
Click here to see answer by stanbon(75887)

Question 719853: Please help, I keep trying to work this problem and I keep getting the wrong answer when I go back to check!
An alloy of gold and silver weighs 150 ounces, 30 ounces of which are gold. If the alloy is to be recast, how much silver must be added to produce an alloy that is 5% gold?
Thanks!
Click here to see answer by stanbon(75887)

Question 719910: Please help. Thankyou.
An aquarium owner tested the chemical levels of the water in her 50 gallon tank. The water tested with a level of 2% of a certain chemical. She wanted to drop the level to a safe level of 1.25% How much of the aquarium water should be removed and pure water added to the aquarium?
Click here to see answer by josmiceli(19441)

Question 720060: A hospital needs 20L of 5% solution. They have 20% solution and 4% solution available. How many L of each 20% and 4% solutions would they have to mix in order to get 20L of 5% solution.
Here's how I've done so far:
x+y=20L
.2x
.04y
.05 (x=y)
.2x+.04y=.05 (x+y)
(I'm not sure if I'm even going the right direction here and this is where I stop knowing what to do)
Click here to see answer by mananth(16946)

Question 720057: How many pints of pure water must be mixed with 3 pints of 70% acetic acid to produce a mixture that is 20% acetic acid? Thank you so much in advance.
Click here to see answer by josgarithmetic(39617)

Question 720270:
A farmer mixes a fertilizer solution that uses 15 parts water to 5 parts fertilizer. If he mixes a solution that uses 10 gallons of fertilizer, how many gallons of water will he use?
Click here to see answer by checkley79(3341)

Question 720539: A grocer mixed nuts worth $4 per kilograms with raisins worth $3.25 per kilogram to make 15 kg of a mixture worth $3.69 per kilogram. How many kilograms of nuts were used ?
Click here to see answer by josgarithmetic(39617)

Question 720619: How many liters of water must be added to 8 liters of a 40% salt solution to obtain a 10% salt solution?
Click here to see answer by josmiceli(19441)

Question 720623: Gus has on hand 5% alcohol solution and a 20% alcohol solution. He needs 30 liters of 10% alcohol solution. How many liters of each solution should he mix together to obtain the mixture he needs?
Click here to see answer by josmiceli(19441)

Question 720744: This is a real problem. I make cast bullets from various mixtures of lead (Pb), tin (Sn) and antimony (An).I have a one-pound piece of Pb-Sn mixture, 30% tin and 70% lead. I want to know how much lead I have to add to the one-pound piece to make the mixture 4% tin and 96% lead.
Click here to see answer by josmiceli(19441)

Question 720789: I'm currently working on Mixture word problems in my college algebra class but I'm stuck on this problem.
One cup of vinegar is mixed with 3 cups of a solution that is 15% vinegar and 85% oil. What is the percent vinegar in the final mixture?
Click here to see answer by stanbon(75887)

Question 720792: I need help with this problem. A previous tutor replied with vinegar + vinegar=Vinegar. Im not really sure what that means or what im supposed to do with that. My question is:
One cup of vinegar is mixed with 3 cups of a solution that is 15% vinegar and 85% oil. what is the percent vinegar in the final mixture?
Click here to see answer by stanbon(75887)

Question 720803: how much pure antifreeze must be added to 20 L of a solution thaT IS 60% antifreeze to make a solution that is 80% antifreeze
Click here to see answer by Edwin McCravy(20056)

Question 720827: how many pints of a 14% isotrpphic alchohol solution should jerry mix with 15 pints of a 5% isotrophic alchohol solution to get a mixture that is 11% isotrophic alchohol?
Click here to see answer by josgarithmetic(39617)

Question 720872: A chocolate drink is 9% pure chocolate by volume. If 11 litres of pure milk are added to 21 litres of this drink, the percent of chocolate in the new drink is approximately
Click here to see answer by josgarithmetic(39617)

Question 7: How many liters of pure water should be evaporated(removed) from 160 liters of 12% saline(salt) solution so that the solution that remains is a 20% solution?
Click here to see answer by Dingoden(1)

Question 720881: 10 liters of a solution has a concentration of 5% sodium hydroxide. It is mixed with 5 liters of a different solution, which has a concentration of 8% sodium hydroxide. What is the new concentration of sodium hydroxide in the solution?
Click here to see answer by josgarithmetic(39617)

Question 720894: How many liters of a 20%-alcohol solution must be mixed with 50 liters of a solution that is 60% alcohol to get a solution that is 30% alcohol?
Click here to see answer by josgarithmetic(39617)

Question 721037: A wholesaler mixed coffee beans worth $6/kg with another kind worth $8.80/kg. The 16 kg mixture was worth $6.70/kg. How many kilograms of each type were used. Algebra must be used. Thank You.
Click here to see answer by josgarithmetic(39617)

Question 721125: A 10% chlorine solution is to be mixed with a 25% chlorine solution
to obtain 30 gallons of 20% solution. How many gallons of each must be used?
Click here to see answer by stanbon(75887)

Question 721399: Otto's car radiator contains 20 quarts of a 25% antifreeze solution. How many quarts of this solution must be drawn off and replaced with pure antifreeze so the radiator is filled with a 40% solution?
Click here to see answer by josgarithmetic(39617)

Question 721557: A hospital needs 40L of 5% solution. They have 20% and 4%. How many Liters of each 20% and 4% would they need to mix to obtain the 40L of 5% solution?
Click here to see answer by nshah11(47)

Question 721621:
How many ounces of pure copper must a goldsmith add to 240 ounces of an alloy containing 40% copper to obtain an alloy containing 60% copper?
Click here to see answer by checkley79(3341)

Question 721620:
A farmer sent 500 bags of onions to a commision merchant; some at P900 a bag and the rest at P500 a bag. If he received P3,940 in payment, how many bags of each did he send?
Click here to see answer by checkley79(3341)

Question 721619:
A grocer mixes cookies worth P89 a pound with cookies worth P99 a pound making a mixture to sell at P93 a pound. If he mixes 50 pounds, how many pounds of each kind does he use?
Click here to see answer by checkley79(3341)

Question 721877: if i have a 29% solution of something and want to make a 3% solution out of it
---how much of the 29% stuff should i start out with in order to prepare 16oz. of the dilute 3% stuff
Please show your work, the steps involved and any formulae as you are able
thank you in advance
Click here to see answer by lwsshak3(11628)

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