Some context: James Watt  (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.
From an early age Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide to produce chlorine. He had already found that an aqueous solution of chlorine could bleach textiles, and had published his findings, which aroused great interest among many potential rivals. When Watt returned to Britain, he began experiments along these lines with hopes of finding a commercially viable process. He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. He passed the chlorine into a weak solution of alkali, and obtained a turbid solution that appeared to have good bleaching properties. He soon communicated these results to James McGrigor, his father-in-law, who was a bleacher in Glasgow. Otherwise he tried to keep his method a secret.  With McGrigor and his wife Annie, he started to scale up the process, and in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction. About this time Berthollet discovered the salt and sulphuric acid process, and published it so it became public knowledge. Many others began to experiment with improving the process, which still had many shortcomings, not the least of which was the problem of transporting the liquid product. Watt's rivals soon overtook him in developing the process, and he dropped out of the race. It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder (calcium hypochlorite) that it became a commercial success.  By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol. Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.
Why is bleach sold as a liquid then?
A: Watt's rivals soon overtook him in developing the process, and he dropped out of the race.

Some context: Carlos Santana  audio  (born July 20, 1947) is a Mexican and American musician who first became famous in the late 1960s and early 1970s with his band, Santana, which pioneered a fusion of rock and Latin American jazz. The band's sound featured his melodic, blues-based guitar lines set against Latin and African rhythms featuring percussion instruments such as timbales and congas not generally heard in rock music. Santana continued to work in these forms over the following decades. He experienced a resurgence of popularity and critical acclaim in the late 1990s.
More radio-friendly singles followed from Santana and the band. "Winning" in 1981 (from Zebop) and "Hold On" (a remake of Canadian artist Ian Thomas' song) in 1982 both reached the top twenty. After his break with Sri Chinmoy, Santana went into the studio to record another solo album with Keith Olson and legendary R&B producer Jerry Wexler. The 1983 album Havana Moon revisited Santana's early musical experiences in Tijuana with Bo Diddley's "Who Do You Love" and the title cut, Chuck Berry's "Havana Moon". The album's guests included Booker T. Jones, the Fabulous Thunderbirds, Willie Nelson and even Santana's father's mariachi orchestra. Santana again paid tribute to his early rock roots by doing the film score to La Bamba, which was based on the life of rock and roll legend Ritchie Valens and starred Lou Diamond Phillips.  The band Santana returned in 1985 with a new album, Beyond Appearances, and two years later with Freedom.  Growing weary of trying to appease record company executives with formulaic hit records, Santana took great pleasure in jamming and making guest appearances with notables such as the jazz fusion group Weather Report, jazz pianist McCoy Tyner, Blues legend John Lee Hooker, Frank Franklin, Living Colour guitarist Vernon Reid, and West African singer Salif Keita. He and Mickey Hart of the Grateful Dead later recorded and performed with Nigerian drummer Babatunde Olatunji, who conceived one of Santana's famous 1960s drum jams, "Jingo". In 1988 Santana organized a reunion with past members from the Santana band for a series of concert dates. CBS records released a 20-year retrospective of the band's accomplishments with Viva Santana! double CD compilation. That same year Santana formed an all-instrumental group featuring jazz legend Wayne Shorter on tenor and soprano saxophone. The group also included Patrice Rushen on keyboards, Alphonso Johnson on bass, Armando Peraza and Chepito Areas on percussion, and Leon "Ndugu" Chancler on drums. They toured briefly and received much acclaim from the music press, who compared the effort with the era of Caravanserai (1972). Santana released another solo record, Blues for Salvador (1987), which won a Grammy Award for Best Rock Instrumental Performance.  In 1990, Santana left Columbia Records after twenty-two years and signed with Polygram. The following year he made a guest appearance on Ottmar Liebert's album, Solo Para Ti (1991), on the songs "Reaching out 2 U" and on a cover of his own song, "Samba Pa Ti". In 1992 Santana hired jam band Phish as his opening act.
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A:
Growing weary of trying to appease record company executives with formulaic hit records, Santana took great pleasure in jamming and making guest appearances