2 teaspoons is 10 ml.
To lower the pH of 100 ml of water to a pH of 5.5, it would take only around a drop of lemon juice. It is estimated that in a gallon aquarium, two drops of lemon juice can lower the pH by .5.
1ml of water weighs 1gram, so it would be a safe bet to say 20 grams
1 1/2
There are 1000 ml in a L.
a normal lemon would yield about 3 tablespoons or 45 ml of juice. Inserting a fork would produce a better yield than microwaving it or rolling it against a counter but still a reamer would still be the best.
20
Lemon juice, because browning is caused by oxygen in the air. The citric acid is an anti-oxidant. Dipping apple slices in a solution of one or two tablespoons of lemon juice in a quart of water will usually prevent the slices from browning. (Metric : 15 to 30 ml per liter)
Take 1 cup as 1/2 a pint, 2 cups = 1 pint > Ratio of juice : water = 1 : 7 = 12.5% juice > So if: 1 quart = 87.5% (0.875) Then : x quart = 12.5% (0.125) > Then x = 1 / 7 quarts = 0.142857 quarts = 135.19 ml (if quarts US) = 162.36 ml (if quarts UK)
150 ml of orange juice weighs about 150 grams
12.5 ml grams
31 1/5 ml
3.05