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Brine worksheet

Grades 6–7 · CCSS 6.RP.A.3.c, 7.RP.A.3

Solve each problem and show your work. Round answers to 2 decimal places where needed.

  1. Problem 1.
    • Brine type: Equilibrium brine (% of water + food)
    • Water: 1 US gal
    • Food weight: 4 lb
    • Salt: 1.8%
    • Sugar: 0%

    Find: Salt

  2. Problem 2.
    • Brine type: Brine strength (% of the brine)
    • Water: 1 US gal
    • Salt: 5%
    • Sugar: 2.2%

    Find: Salt

  3. Problem 3.
    • Brine type: Brine strength (% of the brine)
    • Water: 1 US gal
    • Salt: 5%
    • Sugar: 3%

    Find: Salt

  4. Problem 4.
    • Brine type: Brine strength (% of the brine)
    • Water: 1 US gal
    • Salt: 4%
    • Sugar: 2.8%

    Find: Salt

  5. Problem 5.
    • Brine type: Equilibrium brine (% of water + food)
    • Water: 1 US gal
    • Food weight: 6 lb
    • Salt: 1.3%
    • Sugar: 0%

    Find: Salt

  6. Problem 6.
    • Brine type: Brine strength (% of the brine)
    • Water: 2 US gal
    • Salt: 6%
    • Sugar: 2.5%

    Find: Salt

  7. Problem 7.
    • Brine type: Brine strength (% of the brine)
    • Water: 1 US gal
    • Salt: 5%
    • Sugar: 2.4%

    Find: Salt

  8. Problem 8.
    • Brine type: Brine strength (% of the brine)
    • Water: 1 US gal
    • Salt: 3%
    • Sugar: 2.4%

    Find: Salt

  9. Problem 9.
    • Brine type: Brine strength (% of the brine)
    • Water: 2 US gal
    • Salt: 4%
    • Sugar: 3%

    Find: Salt

  10. Problem 10.
    • Brine type: Brine strength (% of the brine)
    • Water: 2 US gal
    • Salt: 3%
    • Sugar: 2.8%

    Find: Salt

Answer key: Brine worksheet

  1. 1. Salt: 100.8 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Add the food's weight to the water's, because in this kind of brine the salt spreads into both

      3,785.41 g+1,814.37 g=5,599.78 g
    3. Take 1.8% of that combined weight for the salt

      5,599.78×1.8100=100.796063 g
  2. 2. Salt: 204 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.05−0.022=0.928
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      3,785.41×0.050.928=203.955376 g
    4. Work out the sugar the same way, using the sugar share

      3,785.41×0.0220.928=89.740366 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      203.96(3,785.41+203.96+89.74)×100=5 %
  3. 3. Salt: 205.7 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.05−0.03=0.92
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      3,785.41×0.050.92=205.728901 g
    4. Work out the sugar the same way, using the sugar share

      3,785.41×0.030.92=123.437341 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      205.73(3,785.41+205.73+123.44)×100=5 %
  4. 4. Salt: 162.5 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.04−0.028=0.932
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      3,785.41×0.040.932=162.464025 g
    4. Work out the sugar the same way, using the sugar share

      3,785.41×0.0280.932=113.724818 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      162.46(3,785.41+162.46+113.72)×100=4 %
  5. 5. Salt: 84.6 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Add the food's weight to the water's, because in this kind of brine the salt spreads into both

      3,785.41 g+2,721.55 g=6,506.97 g
    3. Take 1.3% of that combined weight for the salt

      6,506.97×1.3100=84.590558 g
  6. 6. Salt: 496.4 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      2 US gal=7,570.82 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.06−0.025=0.915
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      7,570.82×0.060.915=496.447447 g
    4. Work out the sugar the same way, using the sugar share

      7,570.82×0.0250.915=206.853103 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      496.45(7,570.82+496.45+206.85)×100=6 %
  7. 7. Salt: 204.4 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.05−0.024=0.926
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      3,785.41×0.050.926=204.395885 g
    4. Work out the sugar the same way, using the sugar share

      3,785.41×0.0240.926=98.110025 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      204.4(3,785.41+204.4+98.11)×100=5 %
  8. 8. Salt: 120 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      1 US gal=3,785.41 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.03−0.024=0.946
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      3,785.41×0.030.946=120.044771 g
    4. Work out the sugar the same way, using the sugar share

      3,785.41×0.0240.946=96.035817 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      120.04(3,785.41+120.04+96.04)×100=3 %
  9. 9. Salt: 325.6 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      2 US gal=7,570.82 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.04−0.03=0.93
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      7,570.82×0.040.93=325.62682 g
    4. Work out the sugar the same way, using the sugar share

      7,570.82×0.030.93=244.220115 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      325.63(7,570.82+325.63+244.22)×100=4 %
  10. 10. Salt: 241.1 g

    1. Change the water into grams so everything is weighed the same way. 1 mL of water weighs about 1 g

      2 US gal=7,570.82 g
    2. Find the water's share of the finished brine: whatever is left after the salt and sugar shares

      1−0.03−0.028=0.942
    3. Multiply the water by the salt share, then divide by the water's share. That makes salt the chosen share of the whole brine

      7,570.82×0.030.942=241.109031 g
    4. Work out the sugar the same way, using the sugar share

      7,570.82×0.0280.942=225.035095 g
    5. Check the answer: the salt divided by the whole brine's weight gives back your chosen percentage

      241.11(7,570.82+241.11+225.04)×100=3 %