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Adding calcium chloride to a cucumber fermentation brine is intended to

  • A.Bleach the skin of the fruit to a noticeably paler colour
  • B.Keep the fruit firmer than sodium chloride alone would
  • C.Raise the acidity of the brine more quickly
  • D.Provide an extra source of energy for the bacteria

Answer: B

Calcium ions cross-link the pectin of the cell walls and hold the texture, so 20 to 40 millimolar calcium chloride gives firmer pickles, which matters most when the salt concentration is being kept low. It contributes nothing to acidity or nutrition.

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