Compositions in the form of dissolvable solid structures comprising effervescent agglomerated particles

A dissolvable solid structure comprising:

• a) a plurality of fibrous elements, wherein the fibrous elements comprise:
• i. from about 10% to about 75% by weight of a detersive surfactant;
• ii. from about 10% to about 70% by weight water soluble polymeric structurant;
• wherein the plurality of fibrous elements are inter-entangled or otherwise associated with one another to form the dissolvable solid structure;
• and
• wherein at least 50% of the fibrous elements comprise an average diameter less than about 150 microns;
• b) a plurality of effervescent agglomerated particles wherein each effervescent particle comprises:
• i. a carbonic acid particle comprising a solid metal salt of a carbonic acid;
• ii. an acid particle comprising a solid acid;
• and
• iii. a binder that binds the carbonic acid particle to the acid particle;
• wherein the plurality of effervescent agglomerated particles are distributed throughout the dissolvable structure;
• and
• wherein the agglomerated particle comprises a particle size of greater than 300 microns and less than 1000 microns.