Acids

70% acid made from the same acid of two different concentrations. Amount weaker acid to the stronger acid is in ratio 2:1.

What was the concentration of the weaker acid if stronger had 91% concentration?

Correct answer:

c =  59.5 %

Step-by-step explanation:

ab=21 ac+b0.91=0.7(a+b)  2c+10.91=0.7(2+1) c=0.595=59.5%



We will be pleased if You send us any improvements to this math problem. Thank you!






avatar




Tips to related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

Related math problems and questions:

  • Acid
    acid The barrel is 199 liters of 38% acid. How many percent acids occur when 61 liters revoke and replace with the same amount of water?
  • Acid solution
    h2so4 By adding 250 grams of a 96% solution of sulfuric acid to its 3% solution its initial concentration was changed to 25%. How many grams of 3% of the acid were used for dilution?
  • Vinegar
    vinegar We must dilute 16 liters of 8.8% aqueous vinegar to 4.1% one. How much water is necessary to add?
  • Acid evaporation
    roztoky How many kilograms of water do we have to evaporate from 100 kg of 32% acid to make it 80% concentration?
  • Vinegar 2
    ocet How many percentages of vinegar solution will we get if we mix 3.5 liters of 5.8% and 5 liters of 7.6% vinegar?
  • Concentration
    hcl How many grams of 65% and 50% acid is to be mixed to give 240 g acid with a concentration of 60%?
  • A 36
    huby A 36 g sample of the substance contains 91% water. After drying, the weight of the sample was reduced to 18 g. What percentage of water is now in the sample?
  • Alcohol
    no_alcohol How many 55% alcohol we need to pour into 14 liters 75% alcohol to get p3% alcohol? How many 65% alcohol we get?
  • Election mathematics
    statny-znak-sr In elections, 12 political parties received this shares of voters: party A 56.2 %party B 8.5 %party C 8.2 %party D 6.2 %party E 6.1 %party F 5.5 %party G 3.2 %party H 2.1 %party I 2 %party J 1 %party K 1 % Calculate what the shares acquired in the parliam
  • Solutions, mixtures
    roztoky How many liters of 70% solution we must add to 5 liters of 30% solution to give us a 60% solution?
  • Hydrochloric acid
    hcl Determine the concentration of which must have a solution of hydrochloric acid that mixing 10 l of the solution with 8 liters of 26% solution to get the solution with a concentration of 50%?
  • Solutions, mixtures
    roztoky We have 2 liters of 20% solution available. How much 70% solution do we need to add to it to get a 30% solution?
  • Peppers
    paprika In the box are yellow (a), green (b), and red (c) peppers. Their amount is in a ratio of 2:4:1. Most are yellow peppers and green the least. Calculate the number of peppers each type if the total number of peppers is 70.
  • Alcohol 2
    alko Two types of alcohol one 63% and second 75% give 20 liters of 69% alcohol. How many liters of each type are in the mixture?
  • Percent calculation
    percent_sign Calculate 51% if 99% is 79.
  • Pouring alcohol
    roztoky 100 liters of alcohol has 70% How many liters of water need to be added to have 60% alcohol?
  • Peroxide
    peroxide_h How much distilled water (in liters) must pharmacists pour into 300 ml of 23.6% solution of hydrogen peroxide to get 2.7% solution to gargle?